How to create a button Widget

Hi,

Can any one tell me how to create a button widget,

I've created one & it can be seen in my plugin, but it doesn't work,

in .fr file i created the widget as,

ButtonWidget

(

           kEXTCODGoButtonWidgetID,      

           kSysButtonPMRsrcId,

            kBindNone,                        // Binding ,kBindRight | kBindBottom,

            Frame(50,70,140,90)                    // Frame (l,t,r,b)

            kTrue, kTrue,                     // Visible, Enabled

            "Run", // PNGIconAttributes, new for InDesign 3.0              

in DialogObserver.cpp

for AutoAttach & AutoDetach,,

AttachToWidget(kEXTCODGoButtonWidgetID, IID_ITRISTATECONTROLDATA, panelControlData)

in ::update

please tell me what may be the wrong...