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EASY QUESTION FOR POINTS

Posted on 2000-03-06
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Last Modified: 2010-04-04


Raymond/ rwilson,

On the code example you gave to me before, how can I have a window pop-up and stay on top until the other application is finished?  Then clear out and then display a message of completion?  I have tried modifing your previous example that work just fine for that purpose, but when I changed it to not use a timer I keep getting "Access Errors".  Remember that this is being used in a "DLL".  

Thanks
Tony
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Question by:aj85
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LVL 12

Expert Comment

by:rwilson032697
ID: 2589284
To do this I would make a little form showing a message (or whatever) with its form style set to fsStayOnTop.

Create and show the form before starting the process, and after the process has completed close and release it.

Perhaps you could post the code you have now with an indication where the error occurs?

Cheers,

Raymond.
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Author Comment

by:aj85
ID: 2590036

Raymond,

Here is the code:

Function RunMyProcess : integer;            //TJ
 var           si  : TStartupInfo;
               pi  : TProcessInformation;
               dw1 : dword;
               MergeCmd: ANSIString;
               enabled: boolean;
        begin
        enabled:=false;
        MergeCmd:= 'C:\MSSQL7\MERGE\Merge.Exe';
        ZeroMemory(@si,sizeOf(si)); si.cb:=sizeOf(si);
        si.dwFlags:=STARTF_USESHOWWINDOW; si.wShowWindow:=SW_HIDE;
     if CreateProcess(nil,PChar(MergeCmd),nil,nil,false,0,nil,nil,si,pi)
          then begin
                   with TRunThread.Create(true) do        
                   try
                 processHandle:=pi.hProcess;          
                 processReady:=false;                
                 waitingThread:=GetCurrentThreadID;
            // Error happens here....  When I try to call the form  
                 Resume;                              
           repeat
                 Application.HandleMessage;  
           until Application.Terminated or processReady;  
                                                         
     finally Free end;
          GetExitCodeProcess(pi.hProcess,dw1);
          CloseHandle(pi.hThread);
          CloseHandle(pi.hProcess);  
          begin
          if (dw1) = 0 then
          ShowTimedMessage('Merge Successful!', 5)
          else
          if (dw1) = 1 then
          ShowTimedMessage('Merge Unsuccessful! Please retry....', 5);
      //   ShowTimedMessage('Test (exitCode='+IntToStr(dw1)+')', 5);
            end;
        end;
     end;


Thanks,
Tony



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LVL 12

Expert Comment

by:rwilson032697
ID: 2590066
Tony,

Can you post the code that you use at thsi comment:

// Error happens here....  When I try to call the form  

At least I'll be able to see what is going wrong...

Cheers,

Raymond.
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Author Comment

by:aj85
ID: 2590152


Raymond,
 
I simply call a from called frmUtil.
 
Code: frmUtil.show

I then close it later after the application has terminated.

code: frmUtil.close

I know this is where the error is, I am just not sure why?

Thanks
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LVL 12

Accepted Solution

by:
rwilson032697 earned 100 total points
ID: 2590291
It sounds like frmUtil has not been created. Check it is autocreated in the project options or you are creating it before showing it with the frmUtil.show .

Cheers,

Raymond.
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Author Comment

by:aj85
ID: 2607205


Thanks Raymond.
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