Error opening FolderBrowserDialog

microsoft.public.dotnet.framework

4 Oct 2005 4:14 PM

Filipe Marcelino

Hi,

I'm having a little strange problem. When opening a FolderBrowserDialog
with the following instruction:

FolderBrowserDialog1.ShowDialog()

the following exception is thrown:

An unhandled exception of type 'System.InvalidCastException' occurred
in system.windows.forms.dll

Additional information: Unable to cast object of type
System.__ComObject to type IMalloc.

Can someone help me?

Regards,
Filipe Marcelino

4 Oct 2005 7:07 PM

Gabriele G. Ponti

Are you setting some of the properties of the FolderBrowserDialog object to
invalid values?

As alternative, try to use PInvoke to call the SHBrowseForFolder() function:
http://www.pinvoke.net/default.aspx/shell32/SHBrowseForFolder.html

Gabriele