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Overview |
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Group |
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Quick Info
Windows NT
| Yes
| Win95
| Yes
| Win32s
| No
| Import Library
| kernel32.lib
| Header File
| winbase.h
| Unicode
| No
| Platform Notes
| None
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ResumeThread
The ResumeThread function decrements a thread's suspend count. When the suspend count is
decremented to zero, the execution of the thread is resumed.
DWORD ResumeThread(
HANDLE hThread
| // identifies thread to restart
| );
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Parameters
hThread
Specifies a handle for the thread to be restarted.
Windows NT: The handle must have THREAD_SUSPEND_RESUME access to the thread. For more
information, see Thread Objects.
Return Values
If the function succeeds, the return value is the thread's previous suspend
count.
If the function fails, the return value is 0xFFFFFFFF. To get extended error
information, call GetLastError.
Remarks
The ResumeThread function checks the suspend count of the subject thread. If the suspend count
is 0, the thread is not currently suspended. Otherwise, the subject thread's
suspend count is decremented. If the resulting value is 0, then the execution of
the subject thread is resumed.
If the return value is 0, the specified thread was not suspended. If the
return value is 1, the specified thread was suspended but was restarted. If the
return value is greater than 1, the specified thread is still suspended.
Note that while reporting debug events, all threads within the reporting
process are frozen. Debuggers are expected to use the SuspendThread and ResumeThread functions to limit the set of threads that can execute within a process. By
suspending all threads in a process except for the one reporting a debug event,
it is possible to "single step" a single thread. The other threads are not
released by a continue operation if they are suspended.
See Also
SuspendThread
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