private void UpdateIcon(bool forceDestroy = false)
{
if (DesignerProperties.GetIsInDesignMode(this)) return;
var iconVisibility = IconVisibility;
bool showIconInTray = !forceDestroy &&
(iconVisibility == NotifyIconVisibility.Visible ||
(iconVisibility == NotifyIconVisibility.UseControlVisibility && IsVisible));
lock (_syncObj)
{
IntPtr iconHandle = IntPtr.Zero;
try
{
_allWindowsPermission.Demand();
if (showIconInTray && _hwndSource == null)
{
_hwndSource = new NotifyIconHwndSource(this);
}
if (_hwndSource != null)
{
_hwndSource.LockReference(showIconInTray);
var pnid = new NativeMethods.NOTIFYICONDATA
{
uCallbackMessage = (int)NativeMethods.WindowMessage.TrayMouseMessage,
uFlags = NativeMethods.NotifyIconFlags.Message | NativeMethods.NotifyIconFlags.ToolTip,
hWnd = _hwndSource.Handle,
uID = _id,
szTip = Text
};
if (Icon != null)
{
iconHandle = NativeMethods.GetHIcon(Icon);
pnid.uFlags |= NativeMethods.NotifyIconFlags.Icon;
pnid.hIcon = iconHandle;
}
if (showIconInTray && iconHandle != IntPtr.Zero)
{
if (!_iconCreated)
{
NativeMethods.Shell_NotifyIcon(0, pnid);
_iconCreated = true;
}
else
{
NativeMethods.Shell_NotifyIcon(1, pnid);
}
}
else if (_iconCreated)
{
NativeMethods.Shell_NotifyIcon(2, pnid);
_iconCreated = false;
}
}
}
finally
{
if (iconHandle != IntPtr.Zero)
{
NativeMethods.DestroyIcon(iconHandle);
}
}
}
}
public void ShowBalloonTip(int timeout, string tipTitle, string tipText, NotifyBalloonIcon tipIcon)
{
if (timeout < 0)
{
throw new ArgumentOutOfRangeException("timeout", timeout, SR.NotifyIcon_NoNegativeTimeout);
}
ArgumentValidator.NotNullOrEmptyString(tipText, "tipText");
ArgumentValidator.EnumValueIsDefined(typeof(NotifyBalloonIcon), tipIcon, "tipIcon");
if (_iconCreated)
{
_allWindowsPermission.Demand();
var pnid = new NativeMethods.NOTIFYICONDATA
{
hWnd = _hwndSource.Handle,
uID = _id,
uFlags = NativeMethods.NotifyIconFlags.Balloon,
uTimeoutOrVersion = timeout,
szInfoTitle = tipTitle,
szInfo = tipText,
dwInfoFlags = (int)tipIcon
};
NativeMethods.Shell_NotifyIcon(1, pnid);
}
}
