C++/새 장치 감지 WM_DEVICECHANGE

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  1. ...
  2. ON_MESSAGE(WM_DEVICECHANGE, &CTestDlg::OnMyDeviceChange)
  3. ...
  6. char DriveLetterFromMask(int mask) {
  7.     int count = 0; while (mask > 1) { mask >>= 1; count++; }
  8.     return "ABCDEFGHIJKLMNOPQRSTUVWXYZ"[count];
  9. }
  11. LRESULT CTestDlg::OnMyDeviceChange(WPARAM wParam, LPARAM lParam)
  12. {
  13.     if ( DBT_DEVICEARRIVAL == wParam || DBT_DEVICEREMOVECOMPLETE == wParam ) {
  14.         PDEV_BROADCAST_HDR pHdr = (PDEV_BROADCAST_HDR)lParam;
  15.         PDEV_BROADCAST_DEVICEINTERFACE pDevInf;
  16.         PDEV_BROADCAST_HANDLE pDevHnd;
  17.         PDEV_BROADCAST_OEM pDevOem;
  18.         PDEV_BROADCAST_PORT pDevPort;
  19.         PDEV_BROADCAST_VOLUME pDevVolume;
  20.         switch( pHdr->dbch_devicetype ) {
  21.             case DBT_DEVTYP_DEVICEINTERFACE:
  22.                 pDevInf = (PDEV_BROADCAST_DEVICEINTERFACE)pHdr;
  23.                 //UpdateDevice(pDevInf, wParam);
  24.                 break;
  26.             case DBT_DEVTYP_HANDLE:
  27.                 pDevHnd = (PDEV_BROADCAST_HANDLE)pHdr;
  28.                 break;
  30.             case DBT_DEVTYP_OEM:
  31.                 pDevOem = (PDEV_BROADCAST_OEM)pHdr;
  32.                 break;
  34.             case DBT_DEVTYP_PORT:
  35.                 pDevPort = (PDEV_BROADCAST_PORT)pHdr;
  36.                 break;
  38.             case DBT_DEVTYP_VOLUME:
  39.                 pDevVolume = (PDEV_BROADCAST_VOLUME)pHdr;
  41.                 CString str;
  42.                 str.Format(_T("%C:"), DriveLetterFromMask(pDevVolume->dbcv_unitmask));
  44.                 if (wParam == DBT_DEVICEARRIVAL)
  45.                 {
  46.                     OutputDebugString(_T("새 장치 감지"));
  47.                     OutputDebugString(str.GetBuffer(0));
  48.                 }
  50.                 break;
  51.         }
  52.     }
  53. #endif
  54.     return 0;
  55. }
새 장치 감지
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