Control-click

[Guest]

When a control's 'Click' event is triggered, is there a way I can test
whether the CTRL / Alt / Shift keys are pressed as well? I've thought about
capturing KeyDown events before the click but this assumes that the control
is in focus which won't necessarily be so.

 

[Gabriel Lozano-Morán]

You can capture this in the KeyDown() and KeyUp() event

Using either e.Modifiers or checking if e.Control || e.Shift || e.Alt equals
to true

Gabriel Lozano-Morán

 

[Guest]

But as I said, the control won't necessarily be in focus when the CTRL / Alt
/ Shift key is pressed which means the KeyDown / KeyUp events won't be
triggered.

 

[Pipo]

Barguast,

You can capture the keyevents if you set the keypreview to true on the form.
That way when ever the form has the focus, you could get the Keys pressed.

 

[Gabriel Lozano-Morán]

Sorry i totally misunderstood the question. Hope this can help you get
started:

[System.Runtime.InteropServices.DllImport("User32",
EntryPoint="GetKeyState", ExactSpelling=false,
CharSet=System.Runtime.InteropServices.CharSet.Ansi, SetLastError=true)]
private static extern int GetKeyState(long nVirtKey);
private const int VK_CONTROL = 0x11;
private void button1_Click(object sender, System.EventArgs e)
{
MessageBox.Show(GetKeyState(VK_CONTROL).ToString());
}

Gabriel Lozano-Morán

 

[Guest]

Thanks for yours replies, but I've just found out about the static
'System.Windows.Forms.ModifierKeys' property which can be checked during the
click event. For example:

private void Cell_Click (object sender, EventArgs e)
{
if ((Control.ModifierKeys & Keys.Control) == Keys.Control)
{
// The control has been CTRL-Clicked
}
}

That'll do the trick

 

[Morten Wennevik]

Indeed, though it is not the Form's ModifierKeys, but Form inherits from
Control so ...

There is also the static Control.MouseButtons.