TB_BUTTONSTRUCTSIZE  1.EL83U 

The TB_BUTTONSTRUCTSIZE message specifies the size of the TBBUTTONIMY.LD structure.

wParam = (WPARAM) cb;

lParam = 0;

Parameters

cb

Size, in bytes, of the TBBUTTON structure.

The system uses the size to determine which version of the common control dynamic-link library (DLL) is being used.

If an application uses the CreateWindowEx function to create the toolbar, the application must send this message to the toolbar before sending the TB_ADDBITMAP or TB_ADDBUTTONS message. The CreateToolBarEx function automatically sends TB_BUTTONSTRUCTSIZE, and the size of the TBBUTTON structure is a parameter of the function.

Return Values

No return value.

See Also