C++控制程序只运行一个实例

 1 int APIENTRY WinMain(HINSTANCE hInstance,
 2                      HINSTANCE hPrevInstance,
 3                      LPSTR     lpCmdLine,
 4                      int       nCmdShow)
 5 {
 6     HANDLE hMutex = CreateMutex(NULL, false, "win32program");  
 7     if (GetLastError() == ERROR_ALREADY_EXISTS)  
 8     {  
 9         CloseHandle(hMutex);  
10         ::MessageBox(NULL, "程序已经在运行中，不能重复启动！", "提示", MB_OK +MB_ICONWARNING);  
11         return 1;  
12     }
13     do 
14     {
15         Sleep(1000);
16     } while (true);
17     return 0;
18 }