Windows API: Hide a button which is not a child window

views:

answers:

Windows API: Hide a button which is not a child window

I have a program, where I need to disable a specific button on toolbar. "Save" on the Adobe Reader control.

I know it's possible to hide a control by locating its window handle.

Using Spy++, I found the required toolbar. It has buttons and text fields. Although text fields are child windows of the toolbar, buttons aren't windows at all!

How to proceed in that case? Is there a way to hide such buttons? I tried locating them using relative position from the toolbar and displaying something on top, but it's sections can be repositioned manually by user.

+1 A:

You should send a TB_ENABLEBUTTON to the toolbar

Lior Kogan 2010-09-09 11:57:02

Lior, thanks for your answer. I can see wParam is a "Command identifier", where can I find it?

Sphynx 2010-09-09 12:00:38

The value is assigned when adding the button to the toolbar. To discover this value, spy for toolbar notifications (NM_CLICK i presume).

Lior Kogan 2010-09-09 12:05:45

See http://msdn.microsoft.com/en-us/library/bb760435(v=VS.85).aspx for a list of all toolbar notifications.

Lior Kogan 2010-09-09 12:06:21

@Sphynx: see my answer

Cătălin Pitiș 2010-09-09 12:09:10

+1 A:

Supposing you have the hwindow of the toolbar, you could iterate through all the buttons of the toolbar (position based, use TB_BUTTONCOUNT for number of buttons), use TB_GETBUTTON message to get the current command ID, then TB_GETBUTTONTEXT (with the command id) to get the caption of the button. Then use TB_ENABLEBUTTON for the button with the caption you search.

Cătălin Pitiș 2010-09-09 12:08:44

The buttons have icons and no captions. Maybe I can find it by the number? And how to iterate through buttons of the toolbar? Which function should I use?

Sphynx 2010-09-09 12:15:55

It doesn't work, I tried Dim count As IntPtr = SendMessage(toolbarHandle, TB_BUTTONCOUNT, IntPtr.Zero, IntPtr.Zero) with a handler obtained from Spy++, and the result is always "Invalid Windows Handle"

Sphynx 2010-09-09 13:09:44

ansaurus

tags:

views:

answers:

Windows API: Hide a button which is not a child window

related questions