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Catching WM_DRAWITEM

Posted on 1998-07-02
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Last Modified: 2008-03-04
I have a SDI app whose view is a CTreeView.  I want to have owner drawn popup menus.  In order to do this I want to catch the WM_DRAWITEM and WM_MEASUREITEM messages.  These are not offered in class wizard for the view so I put them in by hand.  But as far as I can tell, neither of these messages are sent to the view.  Any suggestions?
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Question by:joeslow
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trestan earned 100 total points
ID: 1167068
You have to go to class info tab in class wizard and change the message filter comboBox and set the option as window. Then you will find what you want.
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by:joeslow
ID: 1167069
Changing the filter to a Window does show the WM_DRAWITEM and WM_MEASUREITEM messages as choices now.  However, they still aren't being sent to the CTreeView.  Someone told me that those messages never get sent to a view but are "control" specific.
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by:trestan
ID: 1167070
The follows is imformation from the online manual. I am afraid that these messages can not sent to a CTreeView.

The WM_MEASUREITEM message is sent to the owner window of an owner-drawn button, combo box, list box, list view control, or menu item when the control or menu is created.

WM_MEASUREITEM
idCtl = (UINT) wParam;                // control identifier
lpmis = (LPMEASUREITEMSTRUCT) lParam; // item-size information
*****************************************************************
The WM_DRAWITEM message is sent to the owner window of an owner-drawn button, combo box, list box, or menu when a visual aspect of the button, combo box, list box, or menu has changed.

WM_DRAWITEM
idCtl = (UINT) wParam;             // control identifier
lpdis = (LPDRAWITEMSTRUCT) lParam; // item-drawing information
 

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