I click my eject button on my program, and I get an exception after it opens the CD Rom drive.
Exception:
Warning: A StringBuilder buffer has been overflowed by unmanaged code. The process may become unstable. Insufficient capacity allocated to the StringBuilder before marshaling it.
Why is this
Thanks,
Phil
private void button1_Click(object sender, EventArgs e)
{
OpenCD();
}
[DllImport("winmm.dll")]
static extern Int32 mciSendString(String command,
StringBuilder buffer, Int32 bufferSize, IntPtr hwndCallback);
public void OpenCD()
{
IntPtr ptr = IntPtr.Zero;
StringBuilder returnstring = new StringBuilder();
mciSendString("set CDAudio door open", returnstring, 127, IntPtr.Zero);
}
Help on winmm.dll exception: "A StringBuilder buffer has been overflowed by unmanaged code"
wowpeter
dxfoo -
If you're still around, please remember to mark questions as answered! It helps pull search results back into VS2005.
Thanks!
Karen
pbiffar
sqldba123
Your buffer is empty as it is just a newly created StringBuilder. You are telling the API call your buffer is 127 bytes.
The buffer will overflow.
Add this line before calling mciSendString()
returnstring.Length = 127;
You might change the call to mciSendString to be
mciSendString("set CDAudio door open", returnstring, returnstring.Length, IntPtr.Zero);