I am trying to grow the current window using keyboard shortcut (windows Up arrow button)

[void][System.Reflection.Assembly]::LoadWithPartialName('System.Windows.Forms')
[System.Windows.Forms.SendKeys]::Sendwait(" (^{ESC}{UP})");

the combinaison does not work correctly

CodePudding user response：

Unfortunately, [System.Windows.Forms.SendKeys] does not directly support sending sending keystrokes based on the Windows key.

To do so, a P/Invoke solution is required, which requires on-demand compilation of C# code via the Add-Member cmdlet, adapted from this answer:

Add-Type -ReferencedAssemblies System.Windows.Forms -UsingNamespace System.Windows.Forms -Namespace demo -Name SendKeyExt  -MemberDefinition  @'
  [DllImport("user32.dll")]
  private static extern void keybd_event(byte bVk, byte bScan, int dwFlags, int dwExtraInfo);

  private const int KEYEVENTF_EXTENDEDKEY = 1;
  private const int KEYEVENTF_KEYUP = 2;

  public static void SendKeysWithWinKey(string keys = null) {
    keybd_event((byte) Keys.LWin, 0, KEYEVENTF_EXTENDEDKEY, 0);
    if (!String.IsNullOrEmpty(keys)) { SendKeys.SendWait(keys.ToLowerInvariant()); }
    keybd_event((byte) Keys.LWin, 0, KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);
  }
'@

The above defines type [demo.SendKeyExt], whose static ::SendKeysWithWinKey() method:

• accepts a string describing a key combination as supported by [System.Windows.Forms.SendKeys]::Send/SendWait, e.g, "{up}"

• and sends that key combination - using .SendWait(), for technical reasons - while programmatically holding down the Windows key (note that the key combination is converted to lowercase for technical reasons; it ensures that letters such as X are correctly recognized as to be combined with the Windows key).

Note that you pay a performance penalty for the ad-hoc compilation performed by Add-Member, but only once per session.

Once the type is defined, you can use it as follows:

# Maximize the current window.
# Same as pressing WinKey Up-Arrow
[demo.SendKeyExt]::SendKeysWithWinKey('{up}')

# Maximize the current window only *vertically* (  == Shift)
# Same as pressing WinKey Shift Up-Arrow
[demo.SendKeyExt]::SendKeysWithWinKey(' {up}')