不规则窗口在程序界面设计中能提供非常好的用户体验，以下是我程序运行时的效果图：
以下是代码,注意需要修改一些简单的位置，如资源ID，项目的头文件等，这些是根据你创建的win32程序的项目名改变的，我的项目名为RgnWindow。
| 1 | // RgnWindow.cpp : Defines the entry point for the application. |
| 2 | // |
| 3 | |
| 4 | #include "stdafx.h" |
| 5 | #include "RgnWindow.h" |
| 6 | #include <comdef.h> |
| 7 | |
| 8 | |
| 9 | #define ULONG_PTR ULONG |
| 10 | #include <gdiplus.h> |
| 11 | using namespace Gdiplus; |
| 12 | #pragma comment(lib, "gdiplus.lib") //注意,要保证vc路径的lib中,能够找到这个文件 |
| 13 | |
| 14 | #define MAX_LOADSTRING 100 |
| 15 | |
| 16 | // Global Variables: |
| 17 | HINSTANCE hInst; // current instance |
| 18 | TCHAR szTitle[MAX_LOADSTRING]; // The title bar text |
| 19 | TCHAR szWindowClass[MAX_LOADSTRING]; // the main window class name |
| 20 | GdiplusStartupInput m_gdiplusStartupInput; |
| 21 | ULONG_PTR m_pGdiToken; |
| 22 | HWND g_hWnd = 0; |
| 23 | Image *g_pImageBack=0; |
| 24 | //透明度颜色混合选项 |
| 25 | BLENDFUNCTION g_Blend; |
| 26 | //背景图的宽度和高度 |
| 27 | int g_BakWidth, g_BakHeight; |
| 28 | |
| 29 | // Forward declarations of functions included in this code module: |
| 30 | ATOM MyRegisterClass(HINSTANCE hInstance); |
| 31 | BOOL InitInstance(HINSTANCE, int); |
| 32 | BOOL ImageFromIDResource(UINT nID, LPCTSTR sTR, Image * & pImg); |
| 33 | LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM); |
| 34 | INT_PTR CALLBACK About(HWND, UINT, WPARAM, LPARAM); |
| 35 | void Update(); |
| 36 | |
| 37 | |
| 38 | int APIENTRY _tWinMain(HINSTANCE hInstance, |
| 39 | HINSTANCE hPrevInstance, |
| 40 | LPTSTR lpCmdLine, |
| 41 | int nCmdShow) |
| 42 | { |
| 43 | GdiplusStartup(&m_pGdiToken,&m_gdiplusStartupInput,NULL); |
| 44 | |
| 45 | UNREFERENCED_PARAMETER(hPrevInstance); |
| 46 | UNREFERENCED_PARAMETER(lpCmdLine); |
| 47 | |
| 48 | // TODO: Place code here. |
| 49 | MSG msg; |
| 50 | HACCEL hAccelTable; |
| 51 | |
| 52 | // Initialize global strings |
| 53 | LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING); |
| 54 | LoadString(hInstance, IDC_RGNWINDOW, szWindowClass, MAX_LOADSTRING); |
| 55 | MyRegisterClass(hInstance); |
| 56 | |
| 57 | // Perform application initialization: |
| 58 | if (!InitInstance (hInstance, nCmdShow)) |
| 59 | { |
| 60 | return FALSE; |
| 61 | } |
| 62 | |
| 63 | hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_RGNWINDOW)); |
| 64 | |
| 65 | // Main message loop: |
| 66 | while (GetMessage(&msg, NULL, 0, 0)) |
| 67 | { |
| 68 | if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg)) |
| 69 | { |
| 70 | TranslateMessage(&msg); |
| 71 | DispatchMessage(&msg); |
| 72 | } |
| 73 | } |
| 74 | GdiplusShutdown(m_pGdiToken); |
| 75 | return (int) msg.wParam; |
| 76 | } |
| 77 | |
| 78 | |
| 79 | |
| 80 | // |
| 81 | // FUNCTION: MyRegisterClass() |
| 82 | // |
| 83 | // PURPOSE: Registers the window class. |
| 84 | // |
| 85 | // COMMENTS: |
| 86 | // |
| 87 | // This function and its usage are only necessary if you want this code |
| 88 | // to be compatible with Win32 systems prior to the 'RegisterClassEx' |
| 89 | // function that was added to Windows 95. It is important to call this function |
| 90 | // so that the application will get 'well formed' small icons associated |
| 91 | // with it. |
| 92 | // |
| 93 | ATOM MyRegisterClass(HINSTANCE hInstance) |
| 94 | { |
| 95 | WNDCLASSEX wcex; |
| 96 | |
| 97 | wcex.cbSize = sizeof(WNDCLASSEX); |
| 98 | |
| 99 | wcex.style = CS_HREDRAW | CS_VREDRAW; |
| 100 | wcex.lpfnWndProc = WndProc; |
| 101 | wcex.cbClsExtra = 0; |
| 102 | wcex.cbWndExtra = 0; |
| 103 | wcex.hInstance = hInstance; |
| 104 | wcex.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDC_RGNWINDOW)); |
| 105 | wcex.hCursor = LoadCursor(NULL, IDC_ARROW); |
| 106 | wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1); |
| 107 | wcex.lpszMenuName = MAKEINTRESOURCE(IDC_RGNWINDOW); |
| 108 | wcex.lpszClassName = szWindowClass; |
| 109 | wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL)); |
| 110 | |
| 111 | return RegisterClassEx(&wcex); |
| 112 | } |
| 113 | |
| 114 | // |
| 115 | // FUNCTION: InitInstance(HINSTANCE, int) |
| 116 | // |
| 117 | // PURPOSE: Saves instance handle and creates main window |
| 118 | // |
| 119 | // COMMENTS: |
| 120 | // |
| 121 | // In this function, we save the instance handle in a global variable and |
| 122 | // create and display the main program window. |
| 123 | // |
| 124 | BOOL InitInstance(HINSTANCE hInstance, int nCmdShow) |
| 125 | { |
| 126 | HWND hWnd; |
| 127 | |
| 128 | hInst = hInstance; // Store instance handle in our global variable |
| 129 | |
| 130 | hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW, |
| 131 | CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL); |
| 132 | |
| 133 | //hWnd=CreateWindowEx(WS_EX_TOPMOST|WS_EX_LAYERED|WS_EX_TOOLWINDOW, szWindowClass,NULL,WS_POPUP|WS_SYSMENU, |
| 134 | // 0,0,300,400,NULL,NULL,hInstance,NULL); |
| 135 | |
| 136 | if (!hWnd) |
| 137 | { |
| 138 | return FALSE; |
| 139 | } |
| 140 | //初始化 |
| 141 | g_Blend.SourceConstantAlpha = int(0 * 2.55);//1~255 |
| 142 | g_Blend.BlendOp=0; //theonlyBlendOpdefinedinWindows2000 |
| 143 | g_Blend.BlendFlags=0; //nothingelseisspecial... |
| 144 | g_Blend.AlphaFormat=1; //... |
| 145 | g_Blend.SourceConstantAlpha=255;//AC_SRC_ALPHA |
| 146 | |
| 147 | DWORD dwExStyle = GetWindowLong(hWnd, GWL_EXSTYLE); |
| 148 | //设置成工具窗口，无标题栏 |
| 149 | SetWindowLong(hWnd, GWL_STYLE, dwExStyle ^ WS_EX_TOOLWINDOW); |
| 150 | //设置成层次窗口 |
| 151 | dwExStyle = ::GetWindowLong(hWnd, GWL_EXSTYLE); |
| 152 | //if((dwExStyle & WS_EX_LAYERED) != WS_EX_LAYERED) |
| 153 | // SetWindowLong(hWnd, GWL_EXSTYLE, dwExStyle|WS_EX_TOPMOST|WS_EX_LAYERED); |
| 154 | |
| 155 | //加载图像 |
| 156 | //ImageFromIDResource(IDR_CLOCK, L"PNG", g_pImageBack); |
| 157 | g_pImageBack = Image::FromFile(_T("D://launcher//bx.png")); |
| 158 | ImageType t = g_pImageBack->GetType(); |
| 159 | |
| 160 | //bkImg.FromFile(); |
| 161 | g_BakWidth = g_pImageBack->GetWidth(); |
| 162 | g_BakHeight = g_pImageBack->GetHeight(); |
| 163 | |
| 164 | |
| 165 | g_hWnd=hWnd; |
| 166 | |
| 167 | |
| 168 | //::SetWindowPos(g_hWnd, HWND_TOPMOST,0,0,g_BakWidth,g_BakHeight,SWP_NOSIZE|SWP_NOMOVE); |
| 169 | |
| 170 | ShowWindow(hWnd, nCmdShow); |
| 171 | UpdateWindow(hWnd); |
| 172 | Update(); |
| 173 | |
| 174 | return TRUE; |
| 175 | } |
| 176 | |
| 177 | // |
| 178 | // FUNCTION: WndProc(HWND, UINT, WPARAM, LPARAM) |
| 179 | // |
| 180 | // PURPOSE: Processes messages for the main window. |
| 181 | // |
| 182 | // WM_COMMAND - process the application menu |
| 183 | // WM_PAINT - Paint the main window |
| 184 | // WM_DESTROY - post a quit message and return |
| 185 | // |
| 186 | // |
| 187 | LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) |
| 188 | { |
| 189 | int wmId, wmEvent; |
| 190 | PAINTSTRUCT ps; |
| 191 | HDC hdc; |
| 192 | |
| 193 | |
| 194 | switch (message) |
| 195 | { |
| 196 | case WM_COMMAND: |
| 197 | wmId = LOWORD(wParam); |
| 198 | wmEvent = HIWORD(wParam); |
| 199 | // Parse the menu selections: |
| 200 | switch (wmId) |
| 201 | { |
| 202 | case IDM_ABOUT: |
| 203 | DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About); |
| 204 | break; |
| 205 | case IDM_EXIT: |
| 206 | DestroyWindow(hWnd); |
| 207 | break; |
| 208 | |
| 209 | default: |
| 210 | return DefWindowProc(hWnd, message, wParam, lParam); |
| 211 | } |
| 212 | break; |
| 213 | case WM_PAINT: |
| 214 | hdc = BeginPaint(hWnd, &ps); |
| 215 | // TODO: Add any drawing code here... |
| 216 | Update(); |
| 217 | EndPaint(hWnd, &ps); |
| 218 | break; |
| 219 | case WM_DESTROY: |
| 220 | PostQuitMessage(0); |
| 221 | break; |
| 222 | case WM_LBUTTONDOWN: |
| 223 | //禁止显示移动矩形窗体框 |
| 224 | ::SystemParametersInfo(SPI_SETDRAGFULLWINDOWS,TRUE,NULL,0); |
| 225 | //非标题栏移动整个窗口 |
| 226 | ::SendMessage(hWnd, WM_SYSCOMMAND, SC_MOVE | HTCAPTION, 0); |
| 227 | break; |
| 228 | default: |
| 229 | return DefWindowProc(hWnd, message, wParam, lParam); |
| 230 | } |
| 231 | return 0; |
| 232 | } |
| 233 | |
| 234 | // Message handler for about box. |
| 235 | INT_PTR CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam) |
| 236 | { |
| 237 | UNREFERENCED_PARAMETER(lParam); |
| 238 | switch (message) |
| 239 | { |
| 240 | case WM_INITDIALOG: |
| 241 | return (INT_PTR)TRUE; |
| 242 | |
| 243 | case WM_COMMAND: |
| 244 | if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL) |
| 245 | { |
| 246 | EndDialog(hDlg, LOWORD(wParam)); |
| 247 | return (INT_PTR)TRUE; |
| 248 | } |
| 249 | break; |
| 250 | } |
| 251 | return (INT_PTR)FALSE; |
| 252 | } |
| 253 | |
| 254 | |
| 255 | BOOL ImageFromIDResource(UINT nID, LPCTSTR sTR, Image * & pImg) |
| 256 | { |
| 257 | HINSTANCE hInst = hInst;//GetResourceInstance(); |
| 258 | HRSRC hRsrc = ::FindResource (hInst,MAKEINTRESOURCE(nID),sTR); // type |
| 259 | if (!hRsrc) |
| 260 | return FALSE; |
| 261 | // load resource into memory |
| 262 | DWORD len = SizeofResource(hInst, hRsrc); |
| 263 | BYTE* lpRsrc = (BYTE*)LoadResource(hInst, hRsrc); |
| 264 | if (!lpRsrc) |
| 265 | return FALSE; |
| 266 | // Allocate global memory on which to create stream |
| 267 | HGLOBAL m_hMem = GlobalAlloc(GMEM_FIXED, len); |
| 268 | BYTE* pmem = (BYTE*)GlobalLock(m_hMem); |
| 269 | memcpy(pmem,lpRsrc,len); |
| 270 | IStream* pstm; |
| 271 | CreateStreamOnHGlobal(m_hMem,FALSE,&pstm); |
| 272 | // load from stream |
| 273 | pImg=Gdiplus::Image::FromStream(pstm); |
| 274 | // free/release stuff |
| 275 | GlobalUnlock(m_hMem); |
| 276 | pstm->Release(); |
| 277 | FreeResource(lpRsrc); |
| 278 | return TRUE; |
| 279 | } |
| 280 | |
| 281 | |
| 282 | void Update() |
| 283 | { |
| 284 | HDC hdcTemp= ::GetDC(g_hWnd); |
| 285 | HDC hdcMemory=CreateCompatibleDC(hdcTemp); |
| 286 | HBITMAP hBitMap=CreateCompatibleBitmap(hdcTemp, g_BakWidth, g_BakHeight); |
| 287 | SelectObject(hdcMemory, hBitMap); |
| 288 | |
| 289 | HDC hdcScreen=::GetDC (g_hWnd); |
| 290 | RECT rct; |
| 291 | ::GetWindowRect(g_hWnd, &rct); |
| 292 | POINT ptWinPos={rct.left,rct.top}; |
| 293 | Graphics graph(hdcMemory); |
| 294 | |
| 295 | Point points[] = { Point(0, 0), |
| 296 | Point(g_BakWidth, 0), |
| 297 | Point(0, g_BakHeight) |
| 298 | }; |
| 299 | |
| 300 | graph.DrawImage(g_pImageBack, points, 3); |
| 301 | |
| 302 | POINT ptDst; |
| 303 | ptDst.x = rct.left; |
| 304 | ptDst.y = rct.top; |
| 305 | SIZE size={g_BakWidth, g_BakHeight}; |
| 306 | |
| 307 | POINT pt; |
| 308 | pt.x = 0; |
| 309 | pt.y = 0; |
| 310 | |
| 311 | //设置成层次窗口 |
| 312 | DWORD dwExStyle = GetWindowLong(g_hWnd,GWL_EXSTYLE); |
| 313 | if((dwExStyle & WS_EX_LAYERED) != WS_EX_LAYERED) |
| 314 | {//WS_EX_LAYERED是0x00080000 |
| 315 | SetWindowLong(g_hWnd, GWL_EXSTYLE,dwExStyle^WS_EX_LAYERED); |
| 316 | } |
| 317 | |
| 318 | //更新窗口 |
| 319 | if (!UpdateLayeredWindow( g_hWnd, hdcScreen, &ptWinPos, |
| 320 | &size, hdcMemory, &pt, 0, &g_Blend, 2)) |
| 321 | { |
| 322 | DWORD dwError = ::GetLastError(); |
| 323 | printf("failed"); |
| 324 | } |
| 325 | //释放资源 |
| 326 | graph.ReleaseHDC(hdcMemory); |
| 327 | ::DeleteObject(hBitMap); |
| 328 | ::DeleteDC(hdcMemory);; |
| 329 | ::ReleaseDC(g_hWnd, hdcTemp); |
| 330 | ::ReleaseDC(g_hWnd, hdcScreen); |
| 331 | } |
以上介绍的就是Windows SDK 实现不规则窗口，希望对你有所帮助。