每日一水~~~~~~~~~打造异形窗体

创建异形窗体：
1：
窗口背景画刷设置为空画刷

2：
创建窗口风格为WS_POPUP 扩展风格设置为WS_EX_TOPMOST 和WS_EX_LAYERED

3：WM_CREATE消息中设置透明颜色（Set）

4： WM_PAINT 绘制背景位图

 1 BITMAP g_hBitmap；
 2  // 加载位图  只能加载24位真彩以下的位图
 3    g_hBitmap = NULL;
 4    g_hBitmap = (HBITMAP)LoadImage(NULL, _T("F:\Shape.bmp"), IMAGE_BITMAP, 0, 0, LR_DEFAULTSIZE | LR_LOADFROMFILE);
 5    if (g_hBitmap == NULL)
 6    {
 7        MessageBox(NULL, _T("加载位图失败"), _T("Error"), MB_ICONERROR);
 8        return FALSE;
 9    }
10 
11    //获取图片的头信息  文件的大小 尺寸 and so on
12    BITMAP bm;
13    GetObject(g_hBitmap, sizeof(bm), &bm);
14    hWnd = ::CreateWindowEx(WS_EX_TOPMOST | WS_EX_LAYERED, szWindowClass, szTitle, WS_POPUP, 640, 300, bm.bmWidth, bm.bmHeight,NULL,NULL,
15                             hInstance,NULL);
16 
17    if (!hWnd)
18    {
19       return FALSE;
20    }
21 
22 
23 
24 
25 
26 case WM_CREATE:
27         {// 
28 
29             COLORREF clrTransparent = RGB(0,0,0);
30             SetLayeredWindowAttributes(hWnd, clrTransparent, 0, LWA_COLORKEY);
31 
32             break;
33         }
34     case WM_PAINT:
35         {
36             hdc = BeginPaint(hWnd, &ps);
37             // TODO:  在此添加任意绘图代码...
38             // 获取窗口客户区大小
39             RECT rcClient;
40             GetClientRect(hWnd, &rcClient);
41             // 创建一个与窗口兼容的内存DC
42             HDC hMenDC = CreateCompatibleDC(hdc);
43 
44             SelectObject(hMenDC, g_hBitmap);
45             BitBlt(hdc, 0, 0, rcClient.right - rcClient.left, rcClient.bottom - rcClient.top, hMenDC, 0, 0, SRCCOPY);
46 
47             DeleteDC(hMenDC);
48             EndPaint(hWnd, &ps);
49              
50         }
51         break;
52     case WM_LBUTTONDOWN:
53         
54             PostMessage(hWnd, WM_SYSCOMMAND, SC_MOVE | HTCAPTION, 0);
55             return TRUE;
56         
57     case WM_KEYDOWN:
58         {
59             switch (wParam)
60             {
61             case VK_ESCAPE:
62                 SendMessage(hWnd, WM_DESTROY, 0, 0);
63                 return TRUE;
64             }
65                        
66         }
67         break;
68 
69 
70 
71 
72 
73 
74 
75 
76 
77 ATOM MyRegisterClass(HINSTANCE hInstance)
78 {
79     WNDCLASSEX wcex;
80 
81     wcex.cbSize = sizeof(WNDCLASSEX);
82 
83     wcex.style            = CS_HREDRAW | CS_VREDRAW;
84     wcex.lpfnWndProc    = WndProc;
85     wcex.cbClsExtra        = 0;
86     wcex.cbWndExtra        = 0;
87     wcex.hInstance        = hInstance;
88     wcex.hIcon            = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_SHAPEDEMO));
89     wcex.hCursor        = LoadCursor(NULL, IDC_ARROW);
90     wcex.hbrBackground = (HBRUSH)GetStockObject(NULL_BRUSH);// (COLOR_WINDOW + 1);//背景画刷
91     wcex.lpszMenuName = NULL;//菜单
92     wcex.lpszClassName    = szWindowClass;
93     wcex.hIconSm        = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));
94 
95     return RegisterClassEx(&wcex);
96 }

代码

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