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Application Starting - detecting Shift Key pressed


I would like to cancel an action if the user holds the shift key while
the application is starting-up.
Would you know what is the best way to do so please?


Jan 23 '06 #1
5 13843
I'm assuming the main question is about the [Shift] key (not cancelling an

Just test the Control modifiers:

if ((System.Window s.Forms.Control .ModifierKeys & Keys.Shift) == Keys.Shift)
System.Diagnost ics.Debug.Write Line("Shift down");

This appears to work even for console applications (if you adda a
reference), which is quite nice...

Jan 23 '06 #2
"Michael Moreno" <mi************ *********@free. fr> wrote in
news:mn******** *************** @free.fr:
I would like to cancel an action if the user holds the shift key while
the application is starting-up.
Would you know what is the best way to do so please?

If you do it from within the Form class, you can use the 'ModifierKeys'.
If you want to do it from Main(...) or anywhere else outside of the Form,
then you can use PInvoke:

[DllImport("user 32.dll")]
static extern short GetKeyState(Vir tualKeyStates nVirtKey);

int ks = GetKeyState(Vir tualKeyStates.V K_SHIFT);
if ((ks & 0x80) != 0)
// SHIFT KEY is pressed

BTW the VirtualKeyState s is an enum defined at pinvoke.net:


But if you wanted you could just set the PInvoke signature to use an int
and pass 0x10.

Jan 23 '06 #3
See my previous post - you don't actually need the PInvoke step, regardless
of whether you are working with a Form subclass.

Jan 23 '06 #4
Thank you very much


Jan 23 '06 #5
"Marc Gravell" <mg******@rm.co m> wrote in
news:eR******** *****@TK2MSFTNG P15.phx.gbl:
See my previous post - you don't actually need the PInvoke step,
regardless of whether you are working with a Form subclass.

Yeah I saw that... that's a good point - thanks for the tip.

Jan 23 '06 #6

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