SetForegroundWindow bringt das Fenster nicht nach vorn

[Dezipaitor]

Das ist Absicht!
Schau mal die Doku dazu an SetForegroundWindow:

Zitat:

The system restricts which processes can set the foreground window. A process can set the foreground window only if one of the following conditions is true:

* The process is the foreground process.
* The process was started by the foreground process.
* The process received the last input event.
* There is no foreground process.
* The foreground process is being debugged.
* The foreground is not locked (see LockSetForegroundWindow).
* The foreground lock time-out has expired (see SPI_GETFOREGROUNDLOCKTIMEOUT in SystemParametersInfo).
* No menus are active.