vb.net - PictureBox - Opacity paint inside given coordinates -


i have picturebox , inside want paint (with opacity don't full hide painted region) determinated region of picture coordniates given.

so far i've 'if' statement when user click picturebox checks if region correct coordinates:

if localmouseposition.x >= 87 , localmouseposition.x <= 131 , localmouseposition.y >= 5 , localmouseposition.y <= 55              label1.text = "coordinate correct"         else             label1.text = ""  end if

now i've no idea how paint clicked region.

thanks in advance.

try like...

highlighted rectangle via paint() event

public class form1      private intarget boolean = false     private target new rectangle(new point(87, 5), new size(45, 51))      private sub picturebox1_click(sender system.object, e system.eventargs) handles picturebox1.click         dim clientcoords point = picturebox1.pointtoclient(cursor.position)         intarget = target.contains(clientcoords)         label1.text = iif(intarget, "coordinate correct", "")         picturebox1.refresh()     end sub      private sub picturebox1_paint(sender object, e system.windows.forms.painteventargs) handles picturebox1.paint         if intarget             using highlight new solidbrush(color.fromargb(128, color.yellow)) ' 0 255                 e.graphics.fillrectangle(highlight, target)             end using         end if     end sub  end class

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