private void AppbarQueryPos(ref NM.tagRect appRect)
{
float ScreenScalingFactor;
using (Graphics g = Graphics.FromHwnd(IntPtr.Zero))
{
IntPtr desktop = g.GetHdc();
int LogicalScreenHeight = NM.GetDeviceCaps(desktop, NM.DeviceCap.VERTRES);
int PhysicalScreenHeight = NM.GetDeviceCaps(desktop, NM.DeviceCap.DESKTOPVERTRES);
g.ReleaseHdc();
ScreenScalingFactor = (float)PhysicalScreenHeight / (float)LogicalScreenHeight;
}
// prepare data structure of message
NM.APPBARDATA msgData = new NM.APPBARDATA();
msgData.cbSize = (UInt32)Marshal.SizeOf(msgData);
msgData.hWnd = Handle;
msgData.uEdge = (UInt32)m_Edge;
msgData.rc = appRect;
// query postion for the appbar
msgData.rc.left = (int)(Math.Round((float)msgData.rc.left * ScreenScalingFactor));
msgData.rc.right = (int)(Math.Round((float)msgData.rc.right * ScreenScalingFactor));
msgData.rc.top = (int)(Math.Round((float)msgData.rc.top * ScreenScalingFactor));
msgData.rc.bottom = (int)(Math.Round((float)msgData.rc.bottom * ScreenScalingFactor));
NM.SHAppBarMessage(NM.AppBarMessages.QueryPos, ref msgData);
msgData.rc.left = (int)(Math.Round((float)msgData.rc.left / ScreenScalingFactor));
msgData.rc.right = (int)(Math.Round((float)msgData.rc.right / ScreenScalingFactor));
msgData.rc.top = (int)(Math.Round((float)msgData.rc.top / ScreenScalingFactor));
msgData.rc.bottom = (int)(Math.Round((float)msgData.rc.bottom / ScreenScalingFactor));
appRect = msgData.rc;
}
public void AppbarNew(AppBarEdges Edge)
{
if (!m_IsAppbarDocked)
{
if (m_CallbackMessageID == 0)
{
throw new Exception("CallbackMessageID is 0");
}
m_Edge = Edge;
m_OriginalSize = this.Size;
m_OriginalLocation = this.Location;
m_PrevBorderStyle = this.FormBorderStyle;
this.FormBorderStyle = FormBorderStyle.None;
// prepare data structure of message
NM.APPBARDATA msgData = new NM.APPBARDATA();
msgData.cbSize = (UInt32)Marshal.SizeOf(msgData);
msgData.hWnd = this.Handle;
msgData.uCallbackMessage = m_CallbackMessageID;
// install new appbar
UIntPtr Return = NM.SHAppBarMessage(NM.AppBarMessages.New, ref msgData);
if (Return == UIntPtr.Zero)
{
throw new Exception("Failed to add AppBar");
}
m_IsAppbarDocked = true;
SizeAppBar();
}
}
public void AppbarRemove()
{
if (m_IsAppbarDocked)
{
// prepare data structure of message
NM.APPBARDATA msgData = new NM.APPBARDATA();
msgData.cbSize = (UInt32)Marshal.SizeOf(msgData);
msgData.hWnd = this.Handle;
// remove appbar
UIntPtr Return = NM.SHAppBarMessage(NM.AppBarMessages.Remove, ref msgData);
if (Return == UIntPtr.Zero)
{
throw new Exception("Failed to remove AppBar");
}
this.FormBorderStyle = m_PrevBorderStyle;
this.Size = m_OriginalSize;
this.Location = m_OriginalLocation;
m_IsAppbarDocked = false;
}
}
