WD2000: Como chamar a função de API do Windows ShellExecute

Parâmetros

                
Parameter            Description
---------------------------------------------------------------------------

   hwnd                 Identifies the parent window.

   lpszOp               A string specifying the operation to perform. This
                        string can be "open" or "print".

   lpszFile             Points to a string specifying the file to open.

   lpszParams           Points to a string specifying parameters passed to
                        the application when the lpszFile parameter
                        specifies an executable file. If lpszFile points to
                        a string specifying a document file, this parameter
                        is NULL.

   lpszDir              Points to a string specifying the default
                        directory.

   fsShowCmd            Specifies whether the application window is to be
                        shown when the application is opened. This
                        parameter can be one of the following values:

      Value          Meaning
      ---------------------------------------------------------------------

      0              Hides the window and passes activation to another
                     window.

      1              Activates and displays a window. If the window is
                     minimized or maximized, Windows restores it to its
                     original size and position (same as 9).

      2              Activates a window and displays it as an icon.

      3              Activates a window and displays it as a maximized
                     window.

      4              Displays a window in its most recent size and
                     position. The window that is currently active remains
                     active.

      5              Activates a window and displays it in its current
                     size and position.

      6              Minimizes the specified window and activates the
                     top-level window in the system's list.

      7              Displays a window as an icon. The window that is
                     currently active remains active.

      8              Displays a window in its current state. The window
                     that is currently active remains active.

      9              Activates and displays a window. If the window is
                     minimized or maximized, Windows restores it to its
                     original size and position (same as 1).

Retorna

O valor de retorno é o identificador de instância do aplicativo que foi aberto ou impresso, se a função tiver êxito. (Essa alça também poderia ser a alça de um aplicativo servidor DDE.) Um retorno de valor menor ou igual a 32 Especifica um erro.

Erros

A função ShellExecute () retorna o valor 31 se não houver nenhuma associação para o tipo de arquivo especificado ou se não houver nenhuma associação para a ação especificada no tipo de arquivo. Os outros valores de erro possíveis são os seguintes:


Value Meaning
---------------------------------------------------------------------------

0 System was out of memory, executable file was corrupt, or
relocations were invalid.

2 File was not found.

3 Path was not found.

5 Attempt was made to dynamically link to a task, or there
was a sharing or network-protection error.

6 Library required separate data segments for each task.

8 There was insufficient memory to start the application.

10 Windows version was incorrect.

11 Executable file was invalid. Either it was not a Windows
application, or there was an error in the .exe image.

12 Application was designed for a different operating system.

13 Application was designed for MS-DOS 4.0.

14 Type of executable file was unknown.

15 Attempt was made to load a real-mode application
(developed for an earlier version of Windows).

16 Attempt was made to load a second instance of an
executable file containing multiple data segments that
were not marked read-only.

19 Attempt was made to load a compressed executable file. The
file must be decompressed before it can be loaded.

20 Dynamic-link library (DLL) file was invalid. One of the
DLLs required to run this application was corrupt.

21 Application requires Microsoft Windows 32-bit extensions.

Comentários

O arquivo especificado pelo parâmetro lpszFile pode ser um arquivo de documento ou um arquivo executável. Se for um arquivo de documento, esta função abre ou imprime, dependendo do valor do parâmetro lpszOp. Se é um arquivo executável, esta função abre-lo, mesmo que a sequência de caracteres "print" é apontada por lpszOp.