Private Sub Command1_Click()
Call Control_CDROM_Door("E:", True) '开
End SubPrivate Sub Command2_Click()
Call Control_CDROM_Door("E:", False) '关
End Sub
Call Control_CDROM_Door("E:", True) '开
End SubPrivate Sub Command2_Click()
Call Control_CDROM_Door("E:", False) '关
End Sub
在使用DriveComboBox控件时,怎样判断光驱或软驱中没有放碟或盘? 拦截消息WM_DEVICECHANGE即可! //响应该消息 procedure Tform1.WMDEVICECHANGE(var msgx :Tmessage); const DBT_DEVICEARRIVAL=$8000; DBT_DEVICEREMOVECOMPLETE=$8004; begin inherited; case msgx.WParam of DBT_DEVICEARRIVAL:Caption :='有了!'; DBT_DEVICEREMOVECOMPLETE:Caption :='取走了'; end; end; 什么拦截?
Dim lngReturn As Long
Dim strReturn As Long'To open the CD door, use this code:
lngReturn = mciSendString("set CDAudio door open", strReturn, 127, 0)
End SubPrivate Sub Command2_Click()
Dim lngReturn As Long
Dim strReturn As Long'To close the CD door, use this code:
lngReturn = mciSendString("set CDAudio door closed", strReturn, 127, 0)
End Sub
只是讨论的人多了。
而且技术上又是简单的问题,我才粘它出来。详细的见 MSDN->DDK什么鬼硬件的控制方法都有。
MSDN->SDK Documentation呕血推荐。看了后很多问题的答案都有,不用问人,乐哉!