TB_INSERTBUTTON Overview Group

The TB_INSERTBUTTON message inserts a button in a toolbar.

TB_INSERTBUTTON 

wParam = (WPARAM) iButton; 

lParam = (LPARAM) (LPTBBUTTON) lpButton;

Parameters

iButton: Zero-based index of a button. The message inserts the new button to the left of this button.
lpButton: Pointer to a TBBUTTON structure containing information about the button to insert.

Returns TRUE if successful or FALSE otherwise.