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copied!<p>I got how to check if psqlodbc has been uninstalled completely so that i can start unistalling postgres</p> <p>For that i found the solution <a href="https://stackoverflow.com/questions/2443886/delphi-wait-until-bat-script-runs-to-the-end">On stackoverflow itself</a></p> <pre><code>function TForm1.ExecAndWait(const CommandLine: string) : Boolean; var StartupInfo: Windows.TStartupInfo; // start-up info passed to process ProcessInfo: Windows.TProcessInformation; // info about the process ProcessExitCode: Windows.DWord; // process's exit code begin // Set default error result Result := False; // Initialise startup info structure to 0, and record length FillChar(StartupInfo, SizeOf(StartupInfo), 0); StartupInfo.cb := SizeOf(StartupInfo); // Execute application commandline if Windows.CreateProcess(nil, PChar(CommandLine), nil, nil, False, 0, nil, nil, StartupInfo, ProcessInfo) then begin try // Now wait for application to complete if Windows.WaitForSingleObject(ProcessInfo.hProcess, INFINITE) = WAIT_OBJECT_0 then // It's completed - get its exit code if Windows.GetExitCodeProcess(ProcessInfo.hProcess, ProcessExitCode) then // Check exit code is zero => successful completion if ProcessExitCode = 0 then Result := True; finally // Tidy up Windows.CloseHandle(ProcessInfo.hProcess); Windows.CloseHandle(ProcessInfo.hThread); end; end; end; </code></pre> <p>so step # 1 <code>if ExecAndWait('msiexec /x C:\psqlodbc09\psqlodbc.msi') then begin //uninstall postgresNow...!! end; </code></p>

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