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4/8/2010

This macro sets the number of bytes per tab reserved for application-defined data in a tab control. You can use this macro or send the TCM_SETITEMEXTRAmessage explicitly.

Syntax 

BOOL TabCtrl_SetItemExtra( 
  HWND 
hwnd, 
  int 
cb 
);

Parameters

hwnd

Handle to the tab control.

cb

Number of extra bytes.

Return Value

TRUE indicates success. FALSE indicates failure.

Remarks

By default, the number of extra bytes is four. An application that changes the number of extra bytes cannot use the TCITEMstructure to retrieve and set the application-defined data for a tab. Instead, you must define a new structure that consists of the TCITEMHEADERstructure followed by application-defined members.

An application should only change the number of extra bytes when a tab control does not contain any tabs.

Requirements

Header commctrl.h
Windows Embedded CE Windows CE 1.0 and later
Windows Mobile Windows Mobile Version 5.0 and later

See Also