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The General Winforms Interview Questions consists the most frequently
asked questions in Winforms. This list of 100+ questions guage your familiarity
with the Winforms platform. The q&a have been collected over a period
of time from various blogs, forums and other similar Winforms sites
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12.Windows Forms from VB6
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| 12.1 How do I draw a
line in VB7 as there is no Line command as there was in VB6?
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| 12.2 What is the
replacement for VB6's SendKeys statement?
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| 12.3 In VB6, I used
control arrays to have a common handler handle events from several controls.
How can I do this in Windows Forms?
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12.1 How do I draw a line in VB7 as there is no Line command as there was in
VB6?
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Try this code:
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Dim g as Graphics
g = frmMain.CreateGraphics()
g.DrawLine(Pens.Black, new Point(0,0), new
Point(frmMain.ClientRectangle.Width), frmMain.ClientRectangle.Height)
g.Dispose()
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This should draw a line from the upper left to the bottom right corner of your
application, but only if it's visible. If this code isn't in the paint event,
when something obscures your application and/or it repaints, this line will
*not* be redrawn.
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12.2 What is the replacement for VB6's SendKeys statement?
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It is the Send method from the SendKeys class found in the System.Windows.Forms
namespace.
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12.3 In VB6, I used control arrays to have a common handler handle events from
several controls. How can I do this in Windows Forms?
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You can specify events from different controls be handled by a single method.
When you define your handler, you can list several events that are to be
handled by listing them in the Handles argument. This statement handles three
different textbox's TextChanged event.
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Private Sub TextsChanged(ByVal sender As System.Object, _
ByVal e As System.EventArgs) _
Handles TextBox1.TextChanged, TextBox2.TextChanged, TextBox3.TextChanged
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In the TextsChanged handler, you may need to identify the particular control
that fired the event. This sender parameter holds the control. You can use it
with code such as:
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