How To Detect Shift+Arrow Key

[Martijn Mulder]

/*
I override IsInputKey() to direct the Arrow Keys (Cursor Keys) to my
custom System.Windows. Forms.Control. But, holding down the Shift-Key
prevents the Arrow Keys from coming through.

How can I intercept the Arrow Keys when holding down the Shift Key?
*/

//class KeyTest
class KeyTest:System. Windows.Forms.C ontrol
{
//constructor
KeyTest()
{
KeyDown+=OnKeyD own;
Paint+=OnPaint;
Dock=System.Win dows.Forms.Dock Style.Fill;
}
//IsInputKey
protected override bool IsInputKey(Syst em.Windows.Form s.Keys a)
{
return
(a==System.Wind ows.Forms.Keys. Down)||
(a==System.Wind ows.Forms.Keys. Left)||
(a==System.Wind ows.Forms.Keys. Right)||
(a==System.Wind ows.Forms.Keys. Up)
?
true
:
base.IsInputKey (a);
}
//OnKeyDown
void OnKeyDown(objec t a,System.Window s.Forms.KeyEven tArgs b)
{
switch(b.KeyCod e)
{
case System.Windows. Forms.Keys.Left :
System.Console. Beep();
break;
case System.Windows. Forms.Keys.Righ t:
System.Console. Beep();
break;
case System.Windows. Forms.Keys.Up:
System.Console. Beep();
break;
case System.Windows. Forms.Keys.Down :
System.Console. Beep();
break;
case System.Windows. Forms.Keys.Esca pe:
System.Windows. Forms.Applicati on.Exit();
break;
}
}
//OnPaint
void OnPaint(object a,System.Window s.Forms.PaintEv entArgs b)
{
b.Graphics.Draw String
(
"Press an Arrow Key to hear a Beep. "+
"Hold down the Shift Key and the Arrow Keys no longer Beep. "+
"How can I solve this?"+
"\n\nPress <Escto quit...",
new System.Drawing. Font
(
"Times New Roman",
26,
System.Drawing. FontStyle.Regul ar,
System.Drawing. GraphicsUnit.Pi xel
),
System.Drawing. Brushes.Black,
new System.Drawing. Rectangle
(
new System.Drawing. Point(0,0),
new System.Drawing. Size(Width,Heig ht)
)
);
}
//Main
[System.STAThrea d]
static void Main()
{
System.Windows. Forms.Form form=new System.Windows. Forms.Form();
form.Text="Shif t+Arrow Keys";
form.Controls.A dd(new KeyTest());
System.Windows. Forms.Applicati on.Run(form);
}
}