First you should change the Key Preview properties of the form to true.
Then at the Key_Down event of the form you should try this.
if (e.Control && e.KeyCode == Keys.M)
{
Perform the operation that you want to do.
Form 2 =new Form();
2.Show();
}
if (e.Alt && e.KeyCode == Keys.M)
{
Perform the operation that you want to do.
Form 2 =new Form();
2.Show();
}
Thanks