performance - Slow load image from button Tool after event Mouse hover and leave in VB.net -

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sorry english writing new vb.net. have button sets image background picture using mouse hover , mouse leave change image . problem seem slow when loading images after event. there way improve performance? 

private sub form1_load(byval sender system.object, byval e system.eventargs) handles mybase.load     button1.backgroundimage = my.resources._1  end sub  private sub button1_mousehover(byval sender object, byval e system.eventargs) handles button1.mousehover     button1.backgroundimage = my.resources._2 end sub  private sub button1_mouseleave(byval sender object, byval e system.eventargs) handles button1.mouseleave     button1.backgroundimage = my.resources._1 end sub

its not image slow load rather default time needs fire mousehover event here more info on mousehovertime seem can set system wide via api though.

a alternative use mouseenter instead of mousehover

private sub form1_load(byval sender system.object, byval e system.eventargs) handles mybase.load     button1.backgroundimage = my.resources._1 end sub 'use mouseenter event instead private sub button1_mouseenter(sender object, e eventargs) handles button1.mouseenter     button1.backgroundimage = my.resources._2 end sub  private sub button1_mouseleave(byval sender object, byval e system.eventargs) handles button1.mouseleave     button1.backgroundimage = my.resources._1 end sub

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