DLL的线程中创建WINDOWS窗口并接收U盘移动磁盘查入消息

来源：互联网发布：家庭收支知多少编辑：程序博客网时间：2024/04/27 00:36
这个问题注意以下几个关键点
1.DLL的句柄的传入
2.线程中的消息循环
HINSTANCE g_hInstance;TCHAR U[2]; //保存U盘的盘符  TCHAR FirstDriveFromMask(ULONG unitmask)  {  char i;  for (i = 0; i < 26; ++i)  {  if (unitmask & 0x1)//看该驱动器的状态是否发生了变化  break;  unitmask = unitmask >> 1;  }  return (i + 'A');  }LRESULT OnDeviceChange(HWND hwnd,WPARAM wParam, LPARAM lParam)  {  PDEV_BROADCAST_HDR lpdb = (PDEV_BROADCAST_HDR)lParam;  if (wParam==DBT_DEVICEARRIVAL)  {  if (lpdb -> dbch_devicetype == DBT_DEVTYP_VOLUME)  {  PDEV_BROADCAST_VOLUME lpdbv = (PDEV_BROADCAST_VOLUME)lpdb;  U[0]=FirstDriveFromMask(lpdbv ->dbcv_unitmask);//得到u盘盘符  U[1]=':';U[2]='\0';MessageBox(0,U,_T("Notice!"),MB_OK); }  }  if (wParam==DBT_DEVICEREMOVECOMPLETE)  {  //设备删除  }  return LRESULT();  }LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam,LPARAM     lParam)  {  switch(message)  {  case WM_DEVICECHANGE:  OnDeviceChange(hwnd,wParam,lParam);  return 0;  case WM_DESTROY:  PostQuitMessage(0);  return 0;  }  return DefWindowProc(hwnd, message, wParam, lParam);  }DWORD WINAPI mythread_create_windows(LPVOID lparam){static TCHAR szAppName[]=TEXT ("UUUUUU");  HWND               hwnd;  MSG                msg;  WNDCLASS           wndclass;  wndclass.style            =0;  wndclass.lpfnWndProc      =WndProc;  wndclass.cbClsExtra       =0;  wndclass.cbWndExtra       =0;  wndclass.hInstance        =g_hInstance;  wndclass.hIcon            =0;  wndclass.hCursor          =0;  wndclass.hbrBackground    =0;  wndclass.lpszMenuName     =NULL;  wndclass.lpszClassName    =szAppName;  if (!RegisterClass (&wndclass))  {  MessageBox (NULL,TEXT("Program requires Windows NT!"),szAppName, MB_ICONERROR);  return 0;  }  hwnd = CreateWindow (szAppName, NULL,  WS_DISABLED,  0, 0,  0, 0,  NULL, NULL, g_hInstance, NULL);  while (GetMessage(&msg, NULL, 0, 0))  {  TranslateMessage (&msg);  DispatchMessage (&msg);  }  return 0;}BOOL APIENTRY DllMain( HMODULE hModule,DWORD  ul_reason_for_call,LPVOID lpReserved){g_hInstance=(HINSTANCE)hModule;switch (ul_reason_for_call){case DLL_PROCESS_ATTACH:OutputDebugStringA("DLL_PROCESS_ATTACH ENTER");//CreateThread(NULL,NULL,mythread,NULL,NULL,NULL);CreateThread(NULL,NULL,mythread_create_windows,NULL,NULL,NULL);OutputDebugStringA("DLL_PROCESS_ATTACH END");break;case DLL_THREAD_ATTACH:break;case DLL_THREAD_DETACH:break;case DLL_PROCESS_DETACH:break;}return TRUE;}