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Callback Functions
Installable drivers can notify the application, window, or task that opened
the given instance about events by using the DriverCallback function. This function gives the driver the means to return information to
an application or DLL while continuing to process a request.
If a driver supports callback functions, the application or DLL that opens the
instance must supply a value this is either the address of a callback
function, a window handle, or a task handle. This value and a flag identifying the type
of the value are typically passed in a structure pointed to by the second
parameter of the DRV_OPEN message.
Related Links
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More Online Helps
Win32 Programmer's Reference (win32.hlp)
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Microsoft Windows Sockets 2 Reference (sock2.hlp)
Microsoft Windows Telephony API (TAPI) Programmer's Reference (tapi.hlp)
Unix Manual Pages
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