vb.net - trigger an event from another control -

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i'm using vb.net , winform. coming across issue i'm pounding head against past few hours.

i have main usercontrol added groupbox , inside groupbox, added control this:

main usercontrol

me.groupbox1.controls.add(me.ctlwithdropdown)

user control ctlwithdropdown

me.controls.add(me.ddlist)  private sub ddllist_selectionchanged(byval sender object, byval e system.eventargs) handles ddllist.selectionchanged 'some simple logic here check if value changed          end sub

the main usercontrol inherits base class has event set value true or false so:

 public event setflag(byval value boolean)

i want know how can trigger/set boolean value dropdownlist when selectionchanged event trigger. on issue?

wire event handler drop down list:

addhandler me.ctldropdown.selectedindexchanged, addressof ddlselectedindexchanged me.groupbox1.controls.add(me.ctldropdown)

make sure create ddlselectedindexchanged in control , have fire setflag event:

protected sub ddlselectedindexchanged(byval sender object, byval e eventargs)     raiseevent setflag(true)  end sub

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