#1303 Alt-tab does nothing in fullscreen mode with Windows 8.1 server

[Ron Isaacson]

I'm using TightVNC 2.7.10 on my client (Windows 7) and all of my servers. When I connect to a Windows 7 server and go to full-screen mode, all special keys, including Alt-Tab, are properly handled on the server.

When I connect to a Windows 8.1 server, Ctrl-Esc and Alt-Esc work fine, but Alt-Tab does absolutely nothing. I've tried this with two different Windows 8.1 servers with the same result.

[Ron Isaacson]

Update: this is related to the issue described here (see comments #3 and #32). The fix described there also works for tvnserver.

In win-system/CurrentConsoleProcess.cpp, find the existing SetTokenInformation code block starting at line 87 and add this below it:

    DWORD uiAccess = 1;
    m_log->debug(_T("Try SetTokenInformation(%p, , , )"),
        (void *)userToken);
    if (SetTokenInformation(userToken,
        TokenUIAccess,
        &uiAccess,
        sizeof(DWORD)) == 0) {
        throw SystemException();
    }

With this change, Alt-Tab is handled correctly.

[Anton]

Ron, thank you for patch, seems it works for service.