BCGSuite for MFC
void CBCGPFileDialog::SetExtraHeight ( int  iExtraHeight)

Sets the extra dialog box client area height

The height of the dialog box's client area is calculated as a height of the Windows standard file dialog plus a height of the logo bitmap (if any) plus the extra height in pixels specified by the iExtraHeight parameter.

iExtraHeightSpecifies additional, in pixels, height of the client area.