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ESDi

Hotkey messages

Use the WIN32 API calls PostMessage and SendMessage to control aspects of ESDi -

(example in C progamming language)

PostMessage(HWND_BROADCAST, WM_HOTKEY, ?, 0);

Where ? = 100 for transmit, 101 for halt transmit and 0 to 9 inclusive to select a 'hotkey transmit to'.

Note: The above is a simple example. There could be unpredicable results on a system which is running many applications. An application should use a Win32 API function like FindWindow to get ESDi's handle. This handle should be used instead of HWND_BROADCAST. FYI: ClassName parameter for the FindWindow function will be ESDi v?.?? - where ?.?? will be the version you are running.

Is ESDi running?

While ESDi is running a mutex exists - "ESDi_mut".

HANDLE h;

DWORD dw;

h=CreateMutex(NULL, TRUE, TEXT("ESDi_mut"));

dw=GetLastError();

if (dw==ERROR_ALREADY_EXISTS) {

//ESDi is currently running..

} else {

ReleaseMutex(h);

//ESDi not running.. (You may wish to start ESDi using CreateProcess)

}