TabCtrl_SetItemExtra
The TabCtrl_SetItemExtra
macro sets the number of bytes per tab reserved for application-defined data in
a tab control. You can use this macro or explicitly send the TCM_SETITEMEXTRA message.
BOOL TabCtrl_SetItemExtra(
|
HWND hwnd, |
|
|
int cb |
|
|
); |
|
Parameters
hwnd
Handle to the
tab control.
cb
Number of
extra bytes.
Return Values
Returns TRUE
if successful or FALSE otherwise.
Remarks
By default,
the number of extra bytes is four. An application that changes the number of
extra bytes cannot use the TC_ITEM structure to retrieve and set the
application-defined data for a tab. Instead, you must define a new structure
that consists of the TC_ITEMHEADER structure followed by
application-defined members.
An
application should only change the number of extra bytes when a tab control
does not contain any tabs.
See Also