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WINEXEC - Wait for completion..

Posted on 1997-05-16
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2,731 Views
Last Modified: 2012-05-04
In the 16 bit world we used to be able to wait for process terminations by calling GetModuleUsage.  Doesn't work in Win32...
How do I wait for a process (that I launched) to complete?  I want to synchronize some launches.  
I have looked at WaitForSingleObject and it doesn't seem to work.  Help.
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Question by:icampbe1
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1 Comment
 
LVL 3

Accepted Solution

by:
sperling earned 80 total points
ID: 1336364
Use CreateProcess to start the process, and WaitForSingleObject to wait for the process *handle*.


function ExecAndWait (AProgram : STRING) : BOOLEAN;
var
  StartupInfo : TStartupInfo;
  ProcessInfo : TProcessInformation;
begin
  FillChar (StartupInfo, SizeOf(StartupInfo), 0);
  StartupInfo.cb := SizeOf(StartupInfo);
  Result := CreateProcess (
    nil,
    PChar(AProgram),
    nil,
    nil,
    FALSE,
    0,
    nil,
    nil,
    StartupInfo,
    ProcessInfo);
  if Result then begin
    WaitForSingleObject(ProcessInfo.hProcess, INFINITE);
    CloseHandle(ProcessInfo.hProcess);
    CloseHandle(ProcessInfo.hThread);
  end;
end;


This function attempts to start the program. If it could not be started, return value will be FALSE. If it was started, the function waits for the process to terminate, and then returns TRUE.

Regards,

Erik.

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