Inserts a button in a toolbar control.
BOOL InsertButton(
   int nIndex,
   LPTBBUTTON lpButton 
);
Parameters
- nIndex 
 Zero-based index of a button. This function inserts the new button to the left of this button.
- lpButton 
 Address of a TBBUTTON structure containing information about the button to insert. See CToolBarCtrl::AddButtons for a description of the TBBUTTON structure.
Return Value
Nonzero if successful; otherwise zero.
Remarks
The image and/or string whose index you provide must have previously been added to the toolbar control's list using AddBitmap, AddString, and/or AddStrings.
Requirements
Header: afxcmn.h