beforeShowform in inline editing

is it possible to fire the beforshowform event in inline editing, because as per wiki i m not able to find any solution to call before show form in inline editing with option editformbutton:true . Any help is much appreciated

Inline editing don't display any form. So usage of beforeShowForm is not possible in inline editing mode.

You wrote about the usage of editformbutton: true. So you probably use formatter: "actions" with the property. In the case you do use form editing. You can specify any form editing options inside of editOptions option (see the documentation). So the usage of formatter: "actions" should be like below

formatter: "actions",
formatoptions: {
    editformbutton: true,
    editOptions: {
        beforeShowForm: function ($form) {
            alert("In beforeShowForm");
        }
    }
}