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Overview |
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Group |
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Quick Info
Windows NT
| Yes
| Win95
| Yes
| Win32s
| Yes
| Import Library
| -
| Header File
| commctrl.h
| Unicode
| No
| Platform Notes
| None
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TCM_SETITEMEXTRA
The TCM_SETITEMEXTRA message sets the number of bytes per tab reserved for
application-defined data in a tab control. You can send this message explicitly or
by using the TabCtrl_SetItemExtra macro.
TCM_SETITEMEXTRA
wParam = (WPARAM) (int) cb; // number of extra bytes
lParam = 0; // not used; must be zero
Parameters
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
TabCtrl_SetItemExtra, TC_ITEM, TC_ITEMHEADER
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Unix Manual Pages
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