Receiving Toolbar Events

Start with the project you created in Changing the Toolbar button State.

Add the following callback function before the WndProc function definition:

L_INT EXT_CALLBACK LeadToolbarProc 
( 
pTOOLBARHANDLE  pToolbar, 
L_UINT  nButtonID, 
L_UINT32        dwData, 
L_VOID    *pUserData 
) 
{ 
   switch ( nButtonID ) 
   { 
      case ID_TOOL_PAINT_BRUSH: 
      { 
         MessageBox ( * ( HWND * ) pUserData, TEXT("BRUSH"), TEXT("Toolbar Message"), MB_OK ) ; 
      } 
      break ; 
      case ID_TOOL_PAINT_SHAPE_LINE: 
      { 
         MessageBox ( * ( HWND * ) pUserData, TEXT("LINE"), TEXT("Toolbar Message"), MB_OK ) ; 
      } 
      break ; 
      case ID_TOOL_PAINT_SHAPE_RECT: 
      { 
         MessageBox ( * ( HWND * ) pUserData, TEXT("RECT"), TEXT("Toolbar Message"), MB_OK ) ; 
      } 
      break ; 
      case ID_TOOL_PAINT_SHAPE_ROUNDRECT: 
      { 
         MessageBox ( * ( HWND * ) pUserData, TEXT("ROUND RECT"), TEXT("Toolbar Message"), MB_OK ) ; 
      } 
      break ; 
      case ID_TOOL_PAINT_SHAPE_BEZIER: 
      { 
         MessageBox ( * ( HWND * ) pUserData, TEXT("BEZIER"), TEXT("Toolbar Message"), MB_OK ) ; 
      } 
      break ; 
      case ID_TOOL_PAINT_REGION_RECT: 
      { 
         MessageBox ( * ( HWND * ) pUserData, TEXT("RECT"), TEXT("Toolbar Message"), MB_OK ) ; 
      } 
      break ; 
      case ID_TOOL_PAINT_FILL_SURFACE: 
      { 
         MessageBox ( * ( HWND * ) pUserData, TEXT("SURFACE"), TEXT("Toolbar Message"), MB_OK ) ; 
      } 
      break ; 
      case ID_TOOL_PAINT_TEXT: 
      { 
         MessageBox ( * ( HWND * ) pUserData, TEXT("TEXT"), TEXT("Toolbar Message"), MB_OK ) ; 
      } 
      break ; 
   } 
    
   return SUCCESS ; 
}

Add the following function call to the WndProc function after the L_TBSetVisible function call in the WM_CREATE message:

// Set the toolbar callback with the owner window as the user defind data   
L_TBSetCallback ( pToolbar, LeadToolbarProc, ( L_VOID  * ) &hwndMain ) ;

Compile and run the project by selecting Build->Execute tutorial.exe from the menu.