Microsoft KB Archive/154122

{|
 * width="100%"|

PRB: TTM_SETTOOLINFO Does Not Subclass

 * }

Q154122

-

The information in this article applies to:


 * Microsoft Win32 Software Development Kit (SDK)

-

SYMPTOMS
When sending a ToolTip control a TTM_SETTOOLINFO message with the TTF_SUBCLASS flag set, the ToolTip will not subclass the specified window.

CAUSE
When it receives the TTM_SETTOOLINFO message, the ToolTip control does not check the TTF_SUBCLASS flag and never attempts to subclass the window. If the window is already subclassed, it will remain subclassed after sending the TTM_SETTOOLINFO message.

RESOLUTION
To have the ToolTip subclass a window, you must use the TTM_ADDTOOL message. If you need to change some tool information for a subclassed window, the existing window will remain subclassed.

STATUS
This behavior is by design.

Additional query words:

Keywords : kbCtrl kbOSWinNT400 kbOSWin2000 kbSDKWin32 kbToolTip kbGrpDSUser kbOSWin95 kbOSWin98

Issue type : kbprb

Technology : kbWin32SDKSearch kbAudDeveloper kbSDKSearch kbWin32sSearch