System.Windows.Forms.Form.WmActivate C# (CSharp) Method

		private void WmActivate (ref Message m)
		{
			if (!this.Enabled && modal_dialogs.Count > 0)
			{
				(modal_dialogs[modal_dialogs.Count -1] as Form).Activate ();
				return; // prevent Activating of disabled form.
			}

			if (m.WParam != (IntPtr)WindowActiveFlags.WA_INACTIVE) {
				if (is_loaded) {
					SelectActiveControl ();

					if (ActiveControl != null && !ActiveControl.Focused)
						SendControlFocus (ActiveControl);
				}

				IsActive = true;
			} else {
				if (XplatUI.IsEnabled (Handle) && XplatUI.GetParent (m.LParam) != Handle)
					ToolStripManager.FireAppFocusChanged (this);
				IsActive = false;
			}
		}