Search
Module:
Directory

   Desktop Functions:

   Smart Device Functions:


Show Recent Changes
Subscribe (RSS)
Misc. Pages
Comments
FAQ
Helpful Tools
Playground
Suggested Reading
Website TODO List
Download Visual Studio Add-In

mciSendString (winmm)
 
.
Summary
The mciSendString function sends a command string to an MCI device. The device that the command is sent to is specified in the command string [This page was changed by iMpostoR]

C# Signature:

[DllImport("winmm.dll")]
static extern Int32 mciSendString(String command,
   StringBuilder buffer, Int32 bufferSize, IntPtr hwndCallback);

OR

[DllImport("winmm.dll")]
static extern Int32 mciSendString(String command,
   StringBuilder buffer, Int32 bufferSize, long hwndCallback);

VB Signature:

Declare Function mciSendStringA Lib "winmm.dll" (command As String, _
   buffer As StringBuilder, bufferSize As Int32, _
   hwndCallback As IntPtr) As Int32

Notes:

None.

Tips & Tricks:

Please add some!

Sample Code:

// Open CD-ROM Drive Door
public void OpenCD()
{
    IntPtr ptr = IntPtr.Zero;
    StringBuilder returnstring = new StringBuilder();
    mciSendString("set CDAudio door open", returnstring,127, IntPtr.Zero);
}
// =========================================
// Open Media File
string sCommand = "open \"" + strFilePath + "\" type mpegvideo alias MediaFile";
mciSendString(sCommand, null, 0, 0);

// Play the Media File
sCommand = "play MediaFile notify";
// _frmObject is your form that will handle the notification messages
mciSendString(sCommand, null, 0, _frmObject.Handle.ToInt64());

// Declare the nofify constant
public const int MM_MCINOTIFY = 953;

// Override the WndProc function in the form
protected override void WndProc(ref Message m)
{
    if (m.Msg == MM_MCINOTIFY)
    {
        // The file is done playing, do whatever
    }

    base.WndProc(ref m);
}

Sample Code:

'Open the CD door in VB
Public Sub OpenCDDoor
    mciSendStringA("set CDAudio door open", 0, 0, 0)
End Sub

Alternative Managed API:

Do you know one? Please contribute it!

Documentation

Please edit this page!

Do you have...

  • helpful tips or sample code to share for using this API in managed code?
  • corrections to the existing content?
  • variations of the signature you want to share?
  • additional languages you want to include?

Select "Edit This Page" on the right hand toolbar and edit it! Or add new pages containing supporting types needed for this API (structures, delegates, and more).

 
Access PInvoke.net directly from VS:
Terms of Use
Find References
Show Printable Version
Revisions