// Boilerplate window-centering code.
// Split out of HookCallback() for clarity.
private static void CenterWindowOnParent(IntPtr hChildWnd)
{
// Get child (MessageBox) size
Win32.RECT rcChild = new Win32.RECT();
Win32.GetWindowRect(hChildWnd, ref rcChild);
int cxChild = rcChild.right - rcChild.left;
int cyChild = rcChild.bottom - rcChild.top;
// Get parent (Form) size & location
IntPtr hParent = Win32.GetParent(hChildWnd);
Win32.RECT rcParent = new Win32.RECT();
Win32.GetWindowRect(hParent, ref rcParent);
int cxParent = rcParent.right - rcParent.left;
int cyParent = rcParent.bottom - rcParent.top;
// Center the MessageBox on the Form
int x = rcParent.left + (cxParent - cxChild) / 2;
int y = rcParent.top + (cyParent - cyChild) / 2;
uint uFlags = 0x15; // SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE;
Win32.SetWindowPos(hChildWnd, IntPtr.Zero, x, y, 0, 0, uFlags);
}
// Boilerplate window-centering code.
// Split out of HookCallback() for clarity.
private static void CenterWindowOnParent(IntPtr hChildWnd)
{
// Get child (MessageBox) size
Win32.RECT rcChild = new Win32.RECT();
Win32.GetWindowRect(hChildWnd, ref rcChild);
int cxChild = rcChild.right - rcChild.left;
int cyChild = rcChild.bottom - rcChild.top;
// Get parent (Form) size & location
IntPtr hParent = Win32.GetParent(hChildWnd);
Win32.RECT rcParent = new Win32.RECT();
Win32.GetWindowRect(hParent, ref rcParent);
int cxParent = rcParent.right - rcParent.left;
int cyParent = rcParent.bottom - rcParent.top;
// Center the MessageBox on the Form
int x = rcParent.left + (cxParent - cxChild) / 2;
int y = rcParent.top + (cyParent - cyChild) / 2;
uint uFlags = 0x15; // SWP_NOSIZE | SWP_NOZORDER | SWP_NOACTIVATE;
Win32.SetWindowPos(hChildWnd, IntPtr.Zero, x, y, 0, 0, uFlags);
}