纯Win32实现带alpha通道的位图的不规则窗口

最新推荐文章于 2025-04-30 09:15:18 发布

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最新推荐文章于 2025-04-30 09:15:18 发布 · 461 阅读

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#c++

#include <windows.h>

/*  Declare Windows procedure  */
LRESULT CALLBACK WindowProcedure(HWND, UINT, WPARAM, LPARAM);

/*  Make the class name into a global variable  */
char szClassName[] = "PNGDialog";

int WINAPI WinMain(HINSTANCE hThisInstance,
	HINSTANCE hPrevInstance,
	LPSTR lpszArgument,
	int nCmdShow)
{
	//bmp文件是带alpha通道的32位深度图片，可由png图片转换得到
	HBITMAP hBmp = (HBITMAP)LoadImageA(NULL, "平滑.bmp", IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE);
	BITMAP bmp;
	GetObject(hBmp, sizeof(BITMAP), &bmp);

	/**/
	HWND hwnd;               /* This is the handle for our window */
	MSG messages;            /* Here messages to the application are saved */
	WNDCLASSEX wincl;        /* Data structure for the windowclass */

							 /* The Window structure */
	wincl.hInstance = hThisInstance;
	wincl.lpszClassName = szClassName;//+-69+
	wincl.lpfnWndProc = WindowProcedure;      /* This function is called by windows */
	wincl.style = CS_DBLCLKS;                 /* Catch