If you want to show browse option on file path control on form then you can apply below trick it will not work simply adding EDT to properties it can work if control linked with table field.
You can Override the Lookup method on StringEdit Control which is used for file path selection without this method browse will not open.
public void lookup()
{
FilenameOpen file;
Filename path;
Filename name;
Filename type;
#File
file = WinAPI::getOpenFileName(element.hWnd(),[WinAPI::fileType(#xlsx),#AllFilesName + #xlsx],path,'Select ...',"",name + type);
if(file)
{
StringEdit.text(file);
}
}