TGFileDialog
This class creates a file selection dialog. It contains a combo box
o select the desired directory. A listview with the differen
files in the current directory and a combo box with which you can
select a filter (on file extensions).
When creating a file dialog one passes a pointer to a TGFileInfo
bject. In this object you can set the fFileTypes and fIniDir t
specify the list of file types for the filter combo box and the
initial directory. When the TGFileDialog ctor returns the selected
file name can be found in the TGFileInfo::fFilename field and the
selected directory in TGFileInfo::fIniDir. The fFilename and
fIniDir are deleted by the TGFileInfo dtor.
