ShellBrowser Delphi Components Documentation
Adds all local drives to a JamFolderCombo.
property IncludeDrives: Boolean;
Setting IncludeDrives to true will add all local drives to the combo box. So just dropping a TJamFolderCombo to your form and setting its IncludeDrives property to true will add a drive combo with Windows 9x look to your form.