不是什么API都给封装一个头文件啊<br><br>LONG MCIWndGetVolume(hwnd) <br><br> <br>// Corresponding message <br>MCIWNDM_GETVOLUME <br>wParam = 0; <br>lParam = 0; <br> <br><br>Retrieves the current volume setting of an MCI device. <br><br>?Returns the current volume setting. The default value is 1000. Higher values indicate louder volumes; lower values indicate quieter volumes.<br><br>hwnd<br><br>Handle of the MCIWnd window.