TCM_DESELECTALL message

Resets items in a tab control, clearing any that were set to the TCIS_BUTTONPRESSED state. You can send this message explicitly or by using the TabCtrl_DeselectAll macro.

Parameters

wParam: Flag that specifies the scope of the item deselection. If this parameter is set to FALSE, all tab items will be reset. If it is set to TRUE, then all tab items except for the one currently selected will be reset.
lParam: Must be zero.

The return value for this message is not used.

This message is only meaningful if the TCS_BUTTONS style flag has been set.

Requirement	Value
Minimum supported client	Windows Vista [desktop apps only]
Minimum supported server	Windows Server 2003 [desktop apps only]
Header	Commctrl.h