attention::怎样打开或关闭CD-ROM

发表于:2007-05-25来源:作者:点击数: 标签:attentionCD-ROM关闭打开怎样
如果你想通过 VB 打开或者关闭CD-ROM,你可以向 Windows Multimedia DLL发出一条相关的命令请求,但是你必须先声明DLL: 在模块文件中加入以下代码: Declare Function mciSendString Lib "winmm.dll" Alias _"mciSendStringA" (ByVal lpstrCommand As Strin

如果你想通过VB打开或者关闭CD-ROM,你可以向Windows Multimedia DLL发出一条相关的命令请求,但是你必须先声明DLL:

在模块文件中加入以下代码:

Declare Function mciSendString Lib "winmm.dll" Alias _"mciSendStringA" (ByVal lpstrCommand As String, ByVal _lpstrReturnString As String, ByVal uReturnLength As Long, _

ByVal hwndCallback As Long) As Long

以下是打开CD-ROM的过程代码:

retvalue = mcisendstring("set CDAudio door open", _

returnstring, 127, 0)

关闭CD-ROM用以下代码:

retvalue = mcisendstring("set CDAudio door closed", _returnstring, 127, 0)

 

原文转自:http://www.ltesting.net