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To open files with associated application

Title: To open files with associated application Question: How to open a file with the associated application Answer: Include the unit SHELLAPI in the clause use. procedure TForm1.ExecFile(F: String); var r: String; begin case ShellExecute(Handle, nil, PChar(F), nil, nil, SW_SHOWNORMAL) of ERROR_FILE_NOT_FOUND: r := 'The specified file was not found.'; ERROR_PATH_NOT_FOUND: r := 'The specified path was not found.'; ERROR_BAD_FORMAT: r := 'The .EXE file is invalid (non-Win32 .EXE or error in .EXE image).'; SE_ERR_ACCESSDENIED: r := 'Windows 95 only: The operating system denied access to the specified file.'; SE_ERR_ASSOCINCOMPLETE: r := 'The filename association is incomplete or invalid.'; SE_ERR_DDEBUSY: r := 'The DDE transaction could not be completed because other DDE transactions were being processed.'; SE_ERR_DDEFAIL: r := 'The DDE transaction failed.'; SE_ERR_DDETIMEOUT: r := 'The DDE transaction could not be completed because the request timed out.'; SE_ERR_DLLNOTFOUND: r := 'Windows 95 only: The specified dynamic-link library was not found.'; SE_ERR_NOASSOC: r := 'There is no application associated with the given filename extension.'; SE_ERR_OOM: r := 'Windows 95 only: There was not enough memory to complete the operation.'; SE_ERR_SHARE: r := 'A sharing violation occurred.'; else Exit; end; ShowMessage(r); end; Use the function like this: procedure TForm1.Button1Click(Sender: TObject); begin ExecFile('c:\windows\ladrilhos.bmp'); end;