internal static int GetWindowLong(HandleRef hWnd, int nIndex)
{
var iResult = 0;
var result = IntPtr.Zero;
var error = 0;
if (IntPtr.Size == 4)
{
// use GetWindowLong
iResult = NativeMethodsSetLastError.GetWindowLong(hWnd, nIndex);
error = Marshal.GetLastWin32Error();
result = new IntPtr(iResult);
}
else
{
// use GetWindowLongPtr
result = NativeMethodsSetLastError.GetWindowLongPtr(hWnd, nIndex);
error = Marshal.GetLastWin32Error();
iResult = NativeMethods.IntPtrToInt32(result);
}
if (result == IntPtr.Zero && error != 0)
{
Debug.WriteLine("GetWindowLong failed. Error = " + error);
}
return(iResult);
}
public static IntPtr GetParent(HandleRef hWnd)
{
var parent = NativeMethodsSetLastError.GetParent(hWnd);
var lastWin32Error = Marshal.GetLastWin32Error();
if (parent == IntPtr.Zero && lastWin32Error != 0)
{
throw new Win32Exception(lastWin32Error);
}
return(parent);
}
/// <summary>
/// Criticals the set window long.
/// </summary>
/// <param name="hWnd">The h WND.</param>
/// <param name="nIndex">Index of the n.</param>
/// <param name="dwNewLong">The dw new long.</param>
/// <returns>IntPtr.</returns>
internal static IntPtr CriticalSetWindowLong(HandleRef hWnd, int nIndex, IntPtr dwNewLong)
{
var result = IntPtr.Zero;
if (IntPtr.Size == 4)
{
// use SetWindowLong
var tempResult =
NativeMethodsSetLastError.SetWindowLong(hWnd, nIndex, NativeMethods.IntPtrToInt32(dwNewLong));
result = new IntPtr(tempResult);
}
else
{
// use SetWindowLongPtr
result = NativeMethodsSetLastError.SetWindowLongPtr(hWnd, nIndex, dwNewLong);
}
return(result);
}