Device Manage for OS/2

Device Manage for OS/2

DevCon for OS/2 - Developer Connection
Operating systems:
ArcaOS, eComStation, IBM OS/2 Warp

Мифы о eComStation

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User Interface

REXX

Drivers/kernel

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WinCancelShutdown

function cancels a request for an application to [[shutdown|shut down]].

#define INCL_WINMESSAGEMGR /* Or use INCL_WIN, INCL_PM, Also in COMMON section */ #include HMQ hmq; /* Handle of message queue for current thread. */ BOOL fCancelAlways; /* Cancellation control. */ BOOL rc; /* Success indicator. */ rc = WinCancelShutdown(hmq, fCancelAlways);

Parameters

hmq (HMQ) - input. Handle of message queue for current thread. fCancelAlways (BOOL) - input. Cancellation control. TRUE No WM_QUIT message should be placed on this queue during system shutdown. FALSE The applications ignore any outstanding WM_QUIT messages already sent to it, but a message should be sent during other system shutdowns.

Returns

rc (BOOL) Success indicator. TRUE Successful completion FALSE Error occurred.

Notes
On a system shutdown, each message queue is normally posted a WM_QUIT message. An application can handle this message in one of two ways:

Destroy its message queue using [[WinDestroyMsgQueue]] (hmq) or,
Call [[WinCancelShutdown]](hmq, FALSE)
Either way the system can proceed to the next queue. If the application determines that it never wants a message queue to receive a [[WM_QUIT]] message as a result of a system shutdown, it should call WinCancelShutdown (hmq, TRUE), typically right after creating the message queue.