EnableWindow and FileRequest browse button

I can change the activation state of a FileRequest widget with

  ; ${_state} is 0 or 1

  FindWindow ${_dialog_id} "#32770" "" $HWNDPARENT

  GetDlgItem ${_widget_id} ${_dialog_id} 1208 ; Field 9

  EnableWindow ${_widget_id} ${_state}

but of course the state of the associated Browse button remains unaltered.

How to I go about getting its ID?

Angus

Will be 1209

-Stu

You'd think I'd try the simple things first, wouldn't ya? Digging away in InstallOptions.cpp...

Thanks you,
Angus