贴一段WM_DEVICECHANGE判断盘符的小代码

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这个函数作为SetWindowsHookEx的第二个参数大一上写的小代码

LRESULT CALLBACK GetMsgProc(int nCode, WPARAM wParam, LPARAM lParam){if (nCode >= 0){CWPSTRUCT *msg = (CWPSTRUCT *)lParam;if (msg->message == WM_DEVICECHANGE){if (msg->wParam == DBT_DEVICEARRIVAL){PDEV_BROADCAST_HDR pDevBroadcastHdr; PDEV_BROADCAST_VOLUME pDevBroadcastVolume; char strVolume;pDevBroadcastHdr = (PDEV_BROADCAST_HDR) ((DWORD)(lParam)); if (pDevBroadcastHdr->dbch_devicetype == DBT_DEVTYP_VOLUME) { pDevBroadcastVolume = (PDEV_BROADCAST_VOLUME)pDevBroadcastHdr; xJudgeDeviceChangePath(pDevBroadcastVolume->dbcv_unitmask, strVolume); } HWND hFind =  FindWindowW(NULL, TEXT("USBMonitor"));SendMessage(hFind, WM_FOUND, NULL, NULL);} }}return CallNextHookEx(g_hhook, nCode, wParam, lParam); }void xJudgeDeviceChangePath(DWORD dwData, char strPath) { char i; for (i = 0; i < 26; ++i) { if (dwData & 0x1) { strPath = char(i + 'A');break; } dwData = dwData >> 1; if(dwData == 0x0000) {break;}} }

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