Change order in which a mouse event is handled - vb.net

Question

I hope I can make it clear what my problem is. I have made my own Chart control
Public Class MyChart
Inherits Chart
[...]
End Class
In this class I handle the MouseDown event of the chart and do stuff like zooming, dragging markers and so on.
In the project I am using the chart I also handle the MouseDown event to do some more specific stuff. Now there is this problem:
In the MouseDown event handler in the MyChart class I use the middle mouse button to drag the chart.
However in the project MouseDown event handler I check if the user hit a specific object and want to let him drag this object also with the middle mouse button. The problem is, that the handler in MyChart is executed first so I can't check if the user hit the object (and therefore initiate the dragging of this object).
What I need is that the event handler in the project is executed first and after this the one in MyChart.
To hopefully make it more clear:
(Dummy Code)
Public Class SomeProject
WithEvents Chart as MyChart
Public Sub Chart_MouseDown(sender as object, e as MouseEventArgs) Handles Chart.MouseDown
'This is executed second, but should be executed first.
End Sub
End Class
Public Class MyChart
Inherits Chart
Public Sub MyChart_MouseDown(sender as object, e as MouseEventArgs) Handles Me.MouseDown
'This is executed first, but should be executed second.
End Sub
End Class
Is there any way I can do this?

Answer 1

Try creating your own event:
Public Class MyChart
Inherits Chart
Public Event ChartMouseDown(sender As Object, e As MouseEventArgs)
Protected Overrides Sub OnMouseDown(e As MouseEventArgs)
RaiseEvent ChartMouseDown(Me, e)
MyBase.OnMouseDown(e)
// your second code here...
End Sub
End Class
Then your project code would look like this:
Public Class SomeProject
WithEvents Chart as MyChart
Public Sub Chart_ChartMouseDown(sender as object, e as MouseEventArgs) _
Handles Chart.ChartMouseDown
// your first code here...
End Sub
End Class