Introduction to the TextOut function for C language Windows program development.
The `TextOut` function is one of the functions in the Windows API used for drawing text on a device. It displays a specified string on a specified device, typically utilized for drawing text in window or console applications.
Here is the basic syntax of the `TextOut` function:
BOOL TextOut(HDC hdc, // 设备句柄
int x, // 起始点的x坐标
int y, // 起始点的y坐标
LPCTSTR lpString, // 要输出的字符串
int c // 字符串的字符数
);
Description of parameters:
hdc: device handle that specifies the device context where the text will be drawn.
x: The x-coordinate of the starting point.
y: The y-coordinate of the starting point.
Pointer lpString to the string to be output.
c: Number of characters to be output. If set to -1, the entire null-terminated string will be output.
Return value:
If the function is successful, it returns a non-zero value; if the function fails, it returns zero.
Usage example:
#include <windows.h>int main()
{
HWND hwnd = GetConsoleWindow();
HDC hdc = GetDC(hwnd);
TextOut(hdc, 10, 10, "Hello, World!", -1);
ReleaseDC(hwnd, hdc);
return 0;
}
The code example above displays the string “Hello, World!” in the console window. Remember to obtain the console window handle and device context handle using the GetConsoleWindow and GetDC functions before using the TextOut function, and release resources by calling the ReleaseDC function after use.
This is just a basic introduction to the `TextOut` function. If you want to learn more about related details, please refer to the official documentation of the Windows API.
