Difference between revisions of "DosSelectSession"
From EDM2
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| − | + | ;DosSelectSession | |
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| + | ==Syntax== | ||
rc = DosSelectSession( ''ulIDSession'' ); | rc = DosSelectSession( ''ulIDSession'' ); | ||
| − | + | ==Parameters== | |
| + | ;ULONG ''ulIDSession'' (input) | ||
| + | :The ID of the session to be switched to the foreground. | ||
| − | + | ==Returns== | |
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APIRET rc | APIRET rc | ||
0 NO_ERROR | 0 NO_ERROR | ||
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463 ERROR_SMG_RETRY_SUB_ALLOC | 463 ERROR_SMG_RETRY_SUB_ALLOC | ||
| − | + | ==Usage Explanation== | |
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| − | + | ||
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DosSelectSession lets a parent session switch one of its child sessions or itself to the foreground, no grandchild session or any other descendant beyond a child session can be selected. The child process will not be brought to the foreground unless the parent session or one of its descendant sessions is currently executing in the foreground. For windowed applications is the application that owns the window focus the foreground session. It is only possible to issue DosSelectSession on sessions started by the current session with DosStartSession, with Related set to SSF_RELATED_CHILD (=1). | DosSelectSession lets a parent session switch one of its child sessions or itself to the foreground, no grandchild session or any other descendant beyond a child session can be selected. The child process will not be brought to the foreground unless the parent session or one of its descendant sessions is currently executing in the foreground. For windowed applications is the application that owns the window focus the foreground session. It is only possible to issue DosSelectSession on sessions started by the current session with DosStartSession, with Related set to SSF_RELATED_CHILD (=1). | ||
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===Sample Code=== | ===Sample Code=== | ||
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#define INCL_DOSSESMGR | #define INCL_DOSSESMGR | ||
#include <os2.h> | #include <os2.h> | ||
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} | } | ||
| − | + | ==See Also== | |
| − | + | *[[DosStartSession]] | |
| − | [[ | + | *[[DosStopSession]] |
| + | *[[DosSetSession]] | ||
| − | [[Category: | + | [[Category:Dos]] |
Revision as of 15:56, 30 December 2016
- DosSelectSession
Syntax
rc = DosSelectSession( ulIDSession );
Parameters
- ULONG ulIDSession (input)
- The ID of the session to be switched to the foreground.
Returns
APIRET rc 0 NO_ERROR 224 ERROR_SMG_NO_TARGET_WINDOW 369 ERROR_SMG_INVALID_SESSION_ID 418 ERROR_SMG_INVALID_CALL 459 ERROR_SMG_BAD_RESERVE 460 ERROR_SMG_PROCESS_NOT_PARENT 463 ERROR_SMG_RETRY_SUB_ALLOC
Usage Explanation
DosSelectSession lets a parent session switch one of its child sessions or itself to the foreground, no grandchild session or any other descendant beyond a child session can be selected. The child process will not be brought to the foreground unless the parent session or one of its descendant sessions is currently executing in the foreground. For windowed applications is the application that owns the window focus the foreground session. It is only possible to issue DosSelectSession on sessions started by the current session with DosStartSession, with Related set to SSF_RELATED_CHILD (=1).
Sample Code
#define INCL_DOSSESMGR
#include <os2.h>
ULONG ulIDSession;
/* Start a child session with DosStartSession */
/* psd->Related=SSF_RELATED_CHILD; */
/* DosStartSession(psd,&ulIDSession,..); */
if(DosSelectSession(ulIDSession)) /* Switch child session to foreground */
{
/* Problems */
}
else
{
/* The child session is now in the foreground */
}
