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- #include
- #include
-
- /* GDI+ startup token */
- ULONG_PTR gdiplusStartupToken;
-
- /* Declare Windows procedure */
- LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM);
-
- // UpdateLayeredWindow Defination
- typedef BOOL(*UPDATELAYEREDWINDOWFUNCTION)(HWND,HDC,POINT*,SIZE*,HDC,POINT*,COLORREF,BLENDFUNCTION*,DWORD);
-
- /* Make the class name into a global variable */
- char szClassName[ ] = "PNGDialog";
-
- int WINAPI WinMain (HINSTANCE hThisInstance,
- HINSTANCE hPrevInstance,
- LPSTR lpszArgument,
- int nCmdShow)
- {
-
- /**/
- Gdiplus::GdiplusStartupInput gdiInput;
- Gdiplus::GdiplusStartup(&gdiplusStartupToken,&gdiInput,NULL);
- /**/
- 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 double-clicks */
- wincl.cbSize = sizeof (WNDCLASSEX);
-
- /* Use default icon and mouse-pointer */
- wincl.hIcon = LoadIcon (NULL, IDI_APPLICATION);
- wincl.hIconSm = LoadIcon (NULL, IDI_APPLICATION);
- wincl.hCursor = LoadCursor (NULL, IDC_ARROW);
- wincl.lpszMenuName = NULL; /* No menu */
- wincl.cbClsExtra = 0; /* No extra bytes after the window class */
- wincl.cbWndExtra = 0; /* structure or the window instance */
- /* Use Windows‘s default colour as the background of the window */
- wincl.hbrBackground = (HBRUSH) COLOR_BACKGROUND;
-
- /* Register the window class, and if it fails quit the program */
- if (!RegisterClassEx (&wincl))
- return 0;
-
- /* The class is registered, let‘s create the program*/
- hwnd = CreateWindowEx (
- WS_EX_LAYERED|WS_EX_TOPMOST|WS_EX_TOOLWINDOW, /* Extended possibilites for variation */
- szClassName, /* Classname */
- "PNGDialog Example Application", /* Title Text */
- WS_OVERLAPPEDWINDOW, /* default window */
- CW_USEDEFAULT, /* Windows decides the position */
- CW_USEDEFAULT, /* where the window ends up on the screen */
- 500, /* The programs width */
- 500, /* and height in pixels */
- HWND_DESKTOP, /* The window is a child-window to desktop */
- NULL, /* No menu */
- hThisInstance, /* Program Instance handler */
- NULL /* No Window Creation data */
- );
-
- /* Make the window visible on the screen */
- ShowWindow (hwnd, nCmdShow);
- LONG style = ::GetWindowLong(hwnd,GWL_STYLE);
- if(style&WS_CAPTION)
- style^=WS_CAPTION;
- if(style&WS_THICKFRAME)
- style^=WS_THICKFRAME;
- if(style&WS_SYSMENU)
- style^=WS_SYSMENU;
- ::SetWindowLong(hwnd,GWL_STYLE,style);
-
- style = ::GetWindowLong(hwnd,GWL_EXSTYLE);
- if(style&WS_EX_APPWINDOW)
- style^=WS_EX_APPWINDOW;
- ::SetWindowLong(hwnd,GWL_EXSTYLE,style);
-
- /********************************************
- * step 1.
- * Using Gdiplus to load the image
- ********************************************/
- RECT wndRect;
- ::GetWindowRect(hwnd,&wndRect);
- SIZE wndSize = {wndRect.right-wndRect.left,wndRect.bottom-wndRect.top};
- HDC hdc = ::GetDC(hwnd);
- HDC memDC = ::CreateCompatibleDC(hdc);
- HBITMAP memBitmap = ::CreateCompatibleBitmap(hdc,wndSize.cx,wndSize.cy);
- ::SelectObject(memDC,memBitmap);
-
- Gdiplus::Image image(L"pic.png");
- Gdiplus::Graphics graphics(memDC);
- graphics.DrawImage(&image,0,0,wndSize.cx,wndSize.cy);
- /********************************************
- * step 2.
- * Get "UpdateLayeredWindow" function‘s
- * proc address.
- ********************************************/
- HMODULE hUser32 = ::LoadLibrary("User32.dll");
- if(!hUser32)
- {
- return FALSE;
- }
- UPDATELAYEREDWINDOWFUNCTION UpdateLayeredWindow = (UPDATELAYEREDWINDOWFUNCTION)::GetProcAddress(hUser32,"UpdateLayeredWindow");
- if(!UpdateLayeredWindow)
- {
- return FALSE;
- }
- // get screen dc
- HDC screenDC = GetDC(NULL);
- POINT ptSrc = {0,0};
-
- /*********************************************
- * step 3.
- * Use UpdateLayeredWindow to Draw the Window
- *
- *********************************************/
- BLENDFUNCTION blendFunction;
- blendFunction.AlphaFormat = AC_SRC_ALPHA;
- blendFunction.BlendFlags = 0;
- blendFunction.BlendOp = AC_SRC_OVER;
- blendFunction.SourceConstantAlpha = 255;
- UpdateLayeredWindow(hwnd,screenDC,&ptSrc,&wndSize,memDC,&ptSrc,0,&blendFunction,2);
-
- ::DeleteDC(memDC);
- ::DeleteObject(memBitmap);
-
- /* Run the message loop. It will run until GetMessage() returns 0 */
- while (GetMessage (&messages, NULL, 0, 0))
- {
- /* Translate virtual-key messages into character messages */
- TranslateMessage(&messages);
- /* Send message to WindowProcedure */
- DispatchMessage(&messages);
- }
- Gdiplus::GdiplusShutdown(gdiplusStartupToken);
- /* The program return-value is 0 - The value that PostQuitMessage() gave */
- return messages.wParam;
- }
-
-
- /* This function is called by the Windows function DispatchMessage() */
-
- LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
- {
- switch (message) /* handle the messages */
- {
- case WM_DESTROY:
- PostQuitMessage (0); /* send a WM_QUIT to the message queue */
- break;
- case WM_LBUTTONDOWN:
- //::SendMessage(hwnd,WM_HIT)
- break;
- default: /* for messages that we don‘t deal with */
- return DefWindowProc (hwnd, message, wParam, lParam);
- }
- return 0;
- }
本文出自 “冰狐浪子的博客” 博客,请务必保留此出处http://bhlzlx.blog.51cto.com/3389283/949818
纯win32实现PNG图片透明窗体,搜素材,soscw.com
纯win32实现PNG图片透明窗体
标签:des com http style blog class c log size t tar
原文地址:http://www.cnblogs.com/lidabo/p/3701249.html