public static Rectangle SetPos(IntPtr hWnd, QueryPosResult pos)
{
APP_BAR_DATA abd = new APP_BAR_DATA();
abd.cbSize = Marshal.SizeOf(abd);
abd.hWnd = hWnd;
abd.uEdge = pos.edge;
abd.rc.top = pos.rc.Top;
abd.rc.bottom = pos.rc.Bottom;
abd.rc.left = pos.rc.Left;
abd.rc.right = pos.rc.Right;
// Pass the final bounding rectangle to the system.
SHAppBarMessage(ABM_SETPOS, ref abd);
MoveWindow(abd.hWnd, abd.rc.left, abd.rc.top, abd.rc.right - abd.rc.left, abd.rc.bottom - abd.rc.top, true);
return(new Rectangle(abd.rc.left, abd.rc.top, abd.rc.right - abd.rc.left, abd.rc.bottom - abd.rc.top));
}
public void RefreshPosition()
{
QueryPosResult ret = QueryPos(this.Handle, this.idealLocation, this.idealSize);
SetPos(this.Handle, ret);
}
public static QueryPosResult QueryPos(IntPtr hWnd, Point idealLocation, Size idealSize)
{
APP_BAR_DATA abd = new APP_BAR_DATA();
abd.cbSize = Marshal.SizeOf(abd);
abd.hWnd = hWnd;
// saved the proposed rectangle
Rectangle R = new Rectangle(idealLocation, idealSize);
abd.rc.left = R.Left;
abd.rc.right = R.Right;
// then figure out which screen that rectangle would be on
Screen S = Screen.FromRectangle(R);
// make it full height
abd.rc.top = S.WorkingArea.Top;
abd.rc.bottom = S.WorkingArea.Bottom;
if (S.Bounds.Left != 0) // multiple monitors
{
R.Offset(-S.Bounds.Left, 0);
}
// see whether we are on the left or right side of the screen
int centerX = (R.Left + R.Right) >> 1;
int centerScreen = S.Bounds.Width >> 1;
if (centerX < 0) // multiple monitors
{
if (Math.Abs(centerX) < centerScreen)
{
abd.uEdge = ABE_RIGHT;
}
else
{
abd.uEdge = ABE_LEFT;
}
}
else if (centerX > centerScreen)
{
abd.uEdge = ABE_RIGHT;
}
else
{
abd.uEdge = ABE_LEFT;
}
// once we've decided on an edge, align the rect cleanly to that edge
switch (abd.uEdge)
{
case ABE_LEFT:
abd.rc.left = S.WorkingArea.Left;
abd.rc.right = abd.rc.left + idealSize.Width;
break;
case ABE_RIGHT:
abd.rc.right = S.WorkingArea.Right;
abd.rc.left = abd.rc.right - idealSize.Width;
break;
}
// Query the system for an approved size and position.
SHAppBarMessage(ABM_QUERYPOS, ref abd);
QueryPosResult ret = new QueryPosResult();
ret.edge = abd.uEdge;
ret.rc = new Rectangle(abd.rc.left, abd.rc.top, abd.rc.right - abd.rc.left, abd.rc.bottom - abd.rc.top);
// return the approved position
return(ret);
}
