vb.net - dynamically create a new tab with textbox, button in the tab with click and keypress events (AddHandler is what i cant get to work) -

i creating tabs , need 2 things work can't work. need addhandler textbox.keypress event , button.click event. can make these things work outside of tabcontrol not in.

in example below text box , buttons have same name on tab another, thought might problem changing names between tabs not work. assume need more specific in addhandler part give tab name control. there logic in real code allow me give unique names each tab panel , controls, can't simple part work.

i left of things tried commented, tried lots , lots of other things.

public class form1   public sub addtab(tabpagename string)      dim tabpage new tabpage     tabpage.text = tabpagename     tabpage.name = "tabpage1" 'real code has logic make sure names unique     dim label1 new label     dim txtcreator new textbox     dim combox1 new combobox     dim tabpagebutton2 new button      tabpagebutton2.parent = tabpage     label1.parent = tabpage     txtcreator.parent = tabpage     combox1.parent = tabpage      label1.location = new point(10, 10)     txtcreator.location = new point(150, 10)     combox1.location = new point(300, 10)     tabpagebutton2.location = new point(20, 40)      label1.text = "creator"     txtcreator.name = "txtcreator"      'fill comboboxes...this come database testing now.     combox1.items.add("one")     combox1.items.add("two")     combox1.items.add("three") 'ok works should work db no problem.      tabroleclass.tabpages.add(tabpage)    end sub    private sub form1_load(sender object, e system.eventargs) handles me.load     addtab("first tab")     addhandler controls("tabroleclass.tabpage1.tabpagebutton2").click, addressof tabpagebutton_click     'addhandler ctype(controls("tabpagebutton"), button).click, addressof tabpagebutton_click     'addhandler controls("tabpagebutton").click, addressof tabpagebutton_click     addhandler ctype(controls("txtcreator"), textbox).keypress, addressof txtcreator_keypress 'the keypress call lookup   end sub   private sub tabpagebutton_click(sender system.object, e system.eventargs) 'handles tabpagebutton.click     messagebox.show(tabroleclass.selectedtab.name.tostring)   end sub    private sub button1_click(sender system.object, e system.eventargs) handles button1.click     addtab("second tab")     tabroleclass.selectedindex = tabroleclass.tabcount - 1     'addhandler controls("tabroleclass.tabpage1.tabpagebutton2").click, addressof tabpagebutton_click     'addhandler ctype(controls("tabpagebutton"), button).click, addressof tabpagebutton_click     'addhandler controls("tabpagebutton").click, addressof tabpagebutton_click     'addhandler ctype(controls("txtcreator"), textbox).keypress, addressof txtcreator_keypress 'the keypress call lookup   end sub   private sub txtcreator_keypress(byval sender object, byval e system.windows.forms.keypresseventargs) 'handles txtcreator.keypress     messagebox.show("keypress worked on " & tabroleclass.selectedtab.name.tostring)   end sub end class 

this confusing question , code cleaning, need add addhandler code addtab subroutine pointed out @plutonix:

public sub addtab(tabpagename string)    dim tabpage new tabpage    dim tabpagebutton new button    dim txtcreator new textbox     /.../     addhandler tabpagebutton.click, addressof tabpagebutton_click    addhandler txtcreator.keydown, addressof txtcreator_keypress     tabroleclass.tabpages.add(tabpage) end sub  private sub tabpagebutton_click()    messagebox.show(tabroleclass.selectedtab.name.tostring) end sub  private sub txtcreator_keypress()    messagebox.show("keypress worked on " & tabroleclass.selectedtab.name.tostring) end sub   private sub form1_load(sender object, e system.eventargs) handles me.load    addtab("first tab")         end sub private sub button1_click(sender system.object, e system.eventargs) handles button1.click    addtab("second tab")    tabroleclass.selectedindex = tabroleclass.tabcount - 1 end sub 

addhandler works adding event handlers controls. this means each time event raised during runtime, new event handler handle event; everytime click tabpagebutton associated event tabpagebutton_click handle it.

therefore, need add handler once, preferably upon creation of control. there absolutely no need create them upon every single keypress, example. should event handlers on msdn.

hope helps!