[[duilioisola]]

Creo que lo que preguntas se resuelve con el quito parámetro de ShellExecute.

De la ayuda de Delphi 6:

The ShellExecute function opens or prints a specified file. The file can be an executable file or a document file. See ShellExecuteEx also.

HINSTANCE ShellExecute(

    HWND hwnd,             // handle to parent window
    LPCTSTR lpOperation,   // pointer to string that specifies operation to perform
    LPCTSTR lpFile,        // pointer to filename or folder name string
    LPCTSTR lpParameters,  // pointer to string that specifies executable-file parameters 
    LPCTSTR lpDirectory,   // pointer to string that specifies default directory
    INT nShowCmd           // whether file is shown when opened
   );

...

lpFile
Pointer to a null-terminated string that specifies the file to open or print or the folder to open or explore. The function can open an executable file or a document file. The function can print a document file.

lpParameters
If lpFile specifies an executable file, lpParameters is a pointer to a null-terminated string that specifies parameters to be passed to the application.
If lpFile specifies a document file, lpParameters should be NULL.

lpDirectory
Pointer to a null-terminated string that specifies the default directory.

...