TB_ISBUTTONCHECKED  2LSI_PN 

The TB_ISBUTTONCHECKED message determines whether the specified button in a toolbar is checked.

TB_ISBUTTONCHECKED

wParam = (WPARAM) idButton;

lParam = 0;

 

Parameters

idButton

Command identifier of the button.

 

Return Values

Returns nonzero if the button is checked or zero otherwise.