{"id":28513,"date":"2024-03-16T10:27:44","date_gmt":"2024-03-16T10:27:44","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-obtain-the-handle-of-a-control-when-opening-a-window-using-dialogboxparam\/"},"modified":"2024-03-22T13:38:19","modified_gmt":"2024-03-22T13:38:19","slug":"how-to-obtain-the-handle-of-a-control-when-opening-a-window-using-dialogboxparam","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-obtain-the-handle-of-a-control-when-opening-a-window-using-dialogboxparam\/","title":{"rendered":"How to obtain the handle of a control when opening a window using DialogBoxParam()?"},"content":{"rendered":"<p>After opening a window using the DialogBoxParam() function, you can obtain the handle of a control by receiving the WM_INITDIALOG message in the window&#8217;s callback function. Within the WM_INITDIALOG message, you can use the GetDlgItem() function to retrieve the handle of a specific control.<\/p>\n<p>Here is an example code:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;Windows.h&gt;<\/span><\/span>\r\n\r\n<span class=\"hljs-comment\">\/\/ \u7a97\u53e3\u56de\u8c03\u51fd\u6570<\/span>\r\n<span class=\"hljs-function\">INT_PTR CALLBACK <span class=\"hljs-title\">DialogProc<\/span><span class=\"hljs-params\">(HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lParam)<\/span>\r\n<\/span>{\r\n    <span class=\"hljs-keyword\">switch<\/span> (uMsg)\r\n    {\r\n    <span class=\"hljs-keyword\">case<\/span> WM_INITDIALOG:\r\n    {\r\n        <span class=\"hljs-comment\">\/\/ \u83b7\u53d6\u63a7\u4ef6\u7684\u53e5\u67c4<\/span>\r\n        HWND hButton = <span class=\"hljs-built_in\">GetDlgItem<\/span>(hwndDlg, IDC_BUTTON1);\r\n        <span class=\"hljs-comment\">\/\/ <span class=\"hljs-doctag\">TODO:<\/span> \u5bf9\u63a7\u4ef6\u8fdb\u884c\u64cd\u4f5c<\/span>\r\n        <span class=\"hljs-comment\">\/\/ ...<\/span>\r\n    }\r\n    <span class=\"hljs-keyword\">break<\/span>;\r\n\r\n    <span class=\"hljs-keyword\">case<\/span> WM_COMMAND:\r\n    {\r\n        <span class=\"hljs-keyword\">if<\/span> (<span class=\"hljs-built_in\">LOWORD<\/span>(wParam) == IDCANCEL)\r\n        {\r\n            <span class=\"hljs-comment\">\/\/ \u5173\u95ed\u7a97\u53e3<\/span>\r\n            <span class=\"hljs-built_in\">EndDialog<\/span>(hwndDlg, <span class=\"hljs-number\">0<\/span>);\r\n        }\r\n    }\r\n    <span class=\"hljs-keyword\">break<\/span>;\r\n\r\n    <span class=\"hljs-keyword\">default<\/span>:\r\n        <span class=\"hljs-keyword\">return<\/span> FALSE;\r\n    }\r\n\r\n    <span class=\"hljs-keyword\">return<\/span> TRUE;\r\n}\r\n\r\n<span class=\"hljs-function\"><span class=\"hljs-type\">int<\/span> WINAPI <span class=\"hljs-title\">WinMain<\/span><span class=\"hljs-params\">(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, <span class=\"hljs-type\">int<\/span> nCmdShow)<\/span>\r\n<\/span>{\r\n    <span class=\"hljs-comment\">\/\/ \u6253\u5f00\u7a97\u53e3<\/span>\r\n    <span class=\"hljs-built_in\">DialogBoxParam<\/span>(hInstance, <span class=\"hljs-built_in\">MAKEINTRESOURCE<\/span>(IDD_DIALOG1), <span class=\"hljs-literal\">NULL<\/span>, DialogProc, <span class=\"hljs-number\">0<\/span>);\r\n\r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n}\r\n<\/code><\/pre>\n<p>In the code above, the handle of the button control with ID IDC_BUTTON1 was obtained using the WM_INITDIALOG message and it can be manipulated. In the WM_COMMAND message, when the user clicks the cancel button(IDCANCEL) on the window, the window is closed using the EndDialog() function.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>After opening a window using the DialogBoxParam() function, you can obtain the handle of a control by receiving the WM_INITDIALOG message in the window&#8217;s callback function. Within the WM_INITDIALOG message, you can use the GetDlgItem() function to retrieve the handle of a specific control. Here is an example code: #include &lt;Windows.h&gt; \/\/ \u7a97\u53e3\u56de\u8c03\u51fd\u6570 INT_PTR CALLBACK [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-28513","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to obtain the handle of a control when opening a window using DialogBoxParam()? - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/blog\/how-to-obtain-the-handle-of-a-control-when-opening-a-window-using-dialogboxparam\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to obtain the handle of a control when opening a window using DialogBoxParam()?\" \/>\n<meta property=\"og:description\" content=\"After opening a window using the DialogBoxParam() function, you can obtain the handle of a control by receiving the WM_INITDIALOG message in the window&#8217;s callback function. Within the WM_INITDIALOG message, you can use the GetDlgItem() function to retrieve the handle of a specific control. Here is an example code: #include &lt;Windows.h&gt; \/\/ \u7a97\u53e3\u56de\u8c03\u51fd\u6570 INT_PTR CALLBACK [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/blog\/how-to-obtain-the-handle-of-a-control-when-opening-a-window-using-dialogboxparam\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/SiliCloudGlobal\/\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-16T10:27:44+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-03-22T13:38:19+00:00\" \/>\n<meta name=\"author\" content=\"Jackson Davis\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:site\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Jackson Davis\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-obtain-the-handle-of-a-control-when-opening-a-window-using-dialogboxparam\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-obtain-the-handle-of-a-control-when-opening-a-window-using-dialogboxparam\/\"},\"author\":{\"name\":\"Jackson Davis\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/55a10b8b0457c35884c25677889ad350\"},\"headline\":\"How to obtain the handle of a control when opening a window using DialogBoxParam()?\",\"datePublished\":\"2024-03-16T10:27:44+00:00\",\"dateModified\":\"2024-03-22T13:38:19+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-obtain-the-handle-of-a-control-when-opening-a-window-using-dialogboxparam\/\"},\"wordCount\":116,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-obtain-the-handle-of-a-control-when-opening-a-window-using-dialogboxparam\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/how-to-obtain-the-handle-of-a-control-when-opening-a-window-using-dialogboxparam\/\",\"name\":\"How to obtain the handle of a control when opening a window using DialogBoxParam()? - Blog - Silicon Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#website\"},\"datePublished\":\"2024-03-16T10:27:44+00:00\",\"dateModified\":\"2024-03-22T13:38:19+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-obtain-the-handle-of-a-control-when-opening-a-window-using-dialogboxparam\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.silicloud.com\/blog\/how-to-obtain-the-handle-of-a-control-when-opening-a-window-using-dialogboxparam\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-obtain-the-handle-of-a-control-when-opening-a-window-using-dialogboxparam\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.silicloud.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"How to obtain the handle of a control when opening a window using DialogBoxParam()?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#website\",\"url\":\"https:\/\/www.silicloud.com\/blog\/\",\"name\":\"Silicon Cloud Blog\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\",\"name\":\"Silicon Cloud Blog\",\"url\":\"https:\/\/www.silicloud.com\/blog\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png\",\"contentUrl\":\"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png\",\"width\":1024,\"height\":1024,\"caption\":\"Silicon Cloud Blog\"},\"image\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/\"},\"sameAs\":[\"https:\/\/www.facebook.com\/SiliCloudGlobal\/\",\"https:\/\/twitter.com\/SiliCloudGlobal\"]},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/55a10b8b0457c35884c25677889ad350\",\"name\":\"Jackson Davis\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/2fdb47d6df1226e92380d96973782572a97b0675d098bb914410dec348eb5d29?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/2fdb47d6df1226e92380d96973782572a97b0675d098bb914410dec348eb5d29?s=96&d=mm&r=g\",\"caption\":\"Jackson Davis\"},\"url\":\"https:\/\/www.silicloud.com\/blog\/author\/jacksondavis\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"How to obtain the handle of a control when opening a window using DialogBoxParam()? - Blog - Silicon Cloud","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.silicloud.com\/blog\/how-to-obtain-the-handle-of-a-control-when-opening-a-window-using-dialogboxparam\/","og_locale":"en_US","og_type":"article","og_title":"How to obtain the handle of a control when opening a window using DialogBoxParam()?","og_description":"After opening a window using the DialogBoxParam() function, you can obtain the handle of a control by receiving the WM_INITDIALOG message in the window&#8217;s callback function. Within the WM_INITDIALOG message, you can use the GetDlgItem() function to retrieve the handle of a specific control. Here is an example code: #include &lt;Windows.h&gt; \/\/ \u7a97\u53e3\u56de\u8c03\u51fd\u6570 INT_PTR CALLBACK [&hellip;]","og_url":"https:\/\/www.silicloud.com\/blog\/how-to-obtain-the-handle-of-a-control-when-opening-a-window-using-dialogboxparam\/","og_site_name":"Blog - Silicon Cloud","article_publisher":"https:\/\/www.facebook.com\/SiliCloudGlobal\/","article_published_time":"2024-03-16T10:27:44+00:00","article_modified_time":"2024-03-22T13:38:19+00:00","author":"Jackson Davis","twitter_card":"summary_large_image","twitter_creator":"@SiliCloudGlobal","twitter_site":"@SiliCloudGlobal","twitter_misc":{"Written by":"Jackson Davis","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.silicloud.com\/blog\/how-to-obtain-the-handle-of-a-control-when-opening-a-window-using-dialogboxparam\/#article","isPartOf":{"@id":"https:\/\/www.silicloud.com\/blog\/how-to-obtain-the-handle-of-a-control-when-opening-a-window-using-dialogboxparam\/"},"author":{"name":"Jackson Davis","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/55a10b8b0457c35884c25677889ad350"},"headline":"How to obtain the handle of a control when opening a window using DialogBoxParam()?","datePublished":"2024-03-16T10:27:44+00:00","dateModified":"2024-03-22T13:38:19+00:00","mainEntityOfPage":{"@id":"https:\/\/www.silicloud.com\/blog\/how-to-obtain-the-handle-of-a-control-when-opening-a-window-using-dialogboxparam\/"},"wordCount":116,"commentCount":0,"publisher":{"@id":"https:\/\/www.silicloud.com\/blog\/#organization"},"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.silicloud.com\/blog\/how-to-obtain-the-handle-of-a-control-when-opening-a-window-using-dialogboxparam\/","url":"https:\/\/www.silicloud.com\/blog\/how-to-obtain-the-handle-of-a-control-when-opening-a-window-using-dialogboxparam\/","name":"How to obtain the handle of a control when opening a window using DialogBoxParam()? - Blog - Silicon Cloud","isPartOf":{"@id":"https:\/\/www.silicloud.com\/blog\/#website"},"datePublished":"2024-03-16T10:27:44+00:00","dateModified":"2024-03-22T13:38:19+00:00","breadcrumb":{"@id":"https:\/\/www.silicloud.com\/blog\/how-to-obtain-the-handle-of-a-control-when-opening-a-window-using-dialogboxparam\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.silicloud.com\/blog\/how-to-obtain-the-handle-of-a-control-when-opening-a-window-using-dialogboxparam\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.silicloud.com\/blog\/how-to-obtain-the-handle-of-a-control-when-opening-a-window-using-dialogboxparam\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.silicloud.com\/blog\/"},{"@type":"ListItem","position":2,"name":"How to obtain the handle of a control when opening a window using DialogBoxParam()?"}]},{"@type":"WebSite","@id":"https:\/\/www.silicloud.com\/blog\/#website","url":"https:\/\/www.silicloud.com\/blog\/","name":"Silicon Cloud Blog","description":"","publisher":{"@id":"https:\/\/www.silicloud.com\/blog\/#organization"},"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.silicloud.com\/blog\/#organization","name":"Silicon Cloud Blog","url":"https:\/\/www.silicloud.com\/blog\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png","contentUrl":"https:\/\/www.silicloud.com\/blog\/wp-content\/uploads\/2023\/11\/EN-SILICON-Full.png","width":1024,"height":1024,"caption":"Silicon Cloud Blog"},"image":{"@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/SiliCloudGlobal\/","https:\/\/twitter.com\/SiliCloudGlobal"]},{"@type":"Person","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/55a10b8b0457c35884c25677889ad350","name":"Jackson Davis","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/2fdb47d6df1226e92380d96973782572a97b0675d098bb914410dec348eb5d29?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/2fdb47d6df1226e92380d96973782572a97b0675d098bb914410dec348eb5d29?s=96&d=mm&r=g","caption":"Jackson Davis"},"url":"https:\/\/www.silicloud.com\/blog\/author\/jacksondavis\/"}]}},"_links":{"self":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/28513","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/comments?post=28513"}],"version-history":[{"count":1,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/28513\/revisions"}],"predecessor-version":[{"id":62816,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/posts\/28513\/revisions\/62816"}],"wp:attachment":[{"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/media?parent=28513"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/categories?post=28513"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.silicloud.com\/blog\/wp-json\/wp\/v2\/tags?post=28513"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}