C# Signature:
[DllImport("kernel32.dll", SetLastError=true)]
static extern UInt32 WaitForSingleObject(IntPtr hHandle, UInt32 dwMilliseconds);
VB.NET Signature:
<DllImport("kernel32", SetLastError := True)> _
Function WaitForSingleObject( _
ByVal handle As IntPtr, _
ByVal milliseconds As UInt32) As UInt32
End Function
Boo Signature:
[DllImport("kernel32.dll", SetLastError : true)]
static def WaitForSingleObject(hHandle as IntPtr, dwMilliseconds as uint) as uint:
pass
User-Defined Types:
None.
Notes:
None.
Tips & Tricks:
C#
const UInt32 INFINITE = 0xFFFFFFFF;
const UInt32 WAIT_ABANDONED = 0x00000080;
const UInt32 WAIT_OBJECT_0 = 0x00000000;
const UInt32 WAIT_TIMEOUT = 0x00000102;
and use:
WaitForSingleObject(handle, (int)INFINITE);
VB.NET
Const INFINITE As UInt32 = &HFFFFFFFFUI
Const WAIT_ABANDONED As UInt32 = &H80UI
Const WAIT_OBJECT_0 As UInt32 = &H0UI
Const WAIT_TIMEOUT As UInt32 = &H102UI
and use:
WaitForSingleObject(handle, INFINITE)
Sample Code:
private void Run()
{
while (bRunning)
{
try
{
if(WaitForSingleObject(ReceivedEvent,INFINITE) == WAIT_OBJECT_0)
{
// Signaled
DoSomething();
}
}
catch(Exception Ex)
{
// An exception occurred
//
trhow(Ex);
}
}
}
UInt32 waitFor;
waitFor = WaitForSingleObject(hMutex, 10000);
if (waitFor == WAIT_TIMEOUT)
throw new ....
else if (waitFor == WAIT_ABANDONED)
{
ReleaseMutex(waitFor);
throw new ....
}
if (waitFor != WAIT_OBJECT_0)
{
throw new Win32Exception("Synchronization Mutex Error.");
}
return 0;
Alternative Managed API:
If you have a System.Diagnostic.Process object (possibly created by Process.Start), call Process.WaitForExit().
If you're waiting on a file system object, look at System.IO.FileSystemWatcher
System.Threading.WaitHandle and derivatives (e.g. AutoResetEvent)
