public static HRESULT ChangeWindowMessageFilterEx(IntPtr hwnd, WM message, MSGFLT action, out MSGFLTINFO filterInfo)
{
filterInfo = MSGFLTINFO.NONE;
if (!Utility.IsOSVistaOrNewer)
{
return(HRESULT.S_FALSE);
}
if (!Utility.IsOSWindows7OrNewer)
{
if (!NativeMethods._ChangeWindowMessageFilter(message, action))
{
return((HRESULT)Win32Error.GetLastError());
}
return(HRESULT.S_OK);
}
else
{
CHANGEFILTERSTRUCT changefilterstruct = new CHANGEFILTERSTRUCT
{
cbSize = (uint)Marshal.SizeOf(typeof(CHANGEFILTERSTRUCT))
};
if (!NativeMethods._ChangeWindowMessageFilterEx(hwnd, message, action, ref changefilterstruct))
{
return((HRESULT)Win32Error.GetLastError());
}
filterInfo = changefilterstruct.ExtStatus;
return(HRESULT.S_OK);
}
}
public static HRESULT ChangeWindowMessageFilterEx(IntPtr hwnd, WM message, MSGFLT action, out MSGFLTINFO filterInfo)
{
filterInfo = MSGFLTINFO.NONE;
bool ret;
// This origins of this API were added for Vista. The Ex version was added for Windows 7.
// If we're not on either, then this message filter isolation doesn't exist.
if (!Utility.IsOSVistaOrNewer)
{
return HRESULT.S_FALSE;
}
// If we're on Vista rather than Win7 then we can't use the Ex version of this function.
// The Ex version is preferred if possible because this results in process-wide modifications of the filter
// and is deprecated as of Win7.
if (!Utility.IsOSWindows7OrNewer)
{
// Note that the Win7 MSGFLT_ALLOW/DISALLOW enum values map to the Vista MSGFLT_ADD/REMOVE
ret = _ChangeWindowMessageFilter(message, action);
if (!ret)
{
return (HRESULT)Win32Error.GetLastError();
}
return HRESULT.S_OK;
}
var filterstruct = new CHANGEFILTERSTRUCT { cbSize = (uint)Marshal.SizeOf(typeof(CHANGEFILTERSTRUCT)) };
ret = _ChangeWindowMessageFilterEx(hwnd, message, action, ref filterstruct);
if (!ret)
{
return (HRESULT)Win32Error.GetLastError();
}
filterInfo = filterstruct.ExtStatus;
return HRESULT.S_OK;
}
public static HRESULT ChangeWindowMessageFilterEx(IntPtr hwnd, WM message, MSGFLT action, out MSGFLTINFO filterInfo)
{
filterInfo = MSGFLTINFO.NONE;
if (!Utility.IsOSVistaOrNewer)
{
return(HRESULT.S_FALSE);
}
if (!Utility.IsOSWindows7OrNewer)
{
if (Standard.NativeMethods.ChangeWindowMessageFilter(message, action))
{
return(HRESULT.S_OK);
}
return((HRESULT)Win32Error.GetLastError());
}
CHANGEFILTERSTRUCT cHANGEFILTERSTRUCT = new CHANGEFILTERSTRUCT()
{
cbSize = (uint)Marshal.SizeOf(typeof(CHANGEFILTERSTRUCT))
};
CHANGEFILTERSTRUCT cHANGEFILTERSTRUCT1 = cHANGEFILTERSTRUCT;
if (!Standard.NativeMethods.ChangeWindowMessageFilterEx_1(hwnd, message, action, ref cHANGEFILTERSTRUCT1))
{
return((HRESULT)Win32Error.GetLastError());
}
filterInfo = cHANGEFILTERSTRUCT1.ExtStatus;
return(HRESULT.S_OK);
}
