FUNCTIONS NonBlocking & NonBlocking_With_Callback

Question

Hi there,
I have a problem i can not solve by my own. I need help please!!
I need to open a PDF file from my aplication, and it will open if the path of Windows (cmd \ path) has the AcroRd32.exe on it. If the user has it configured on his computer like that, i would like to use the first function, and if not, the NonBlocking_with_callback so i can put on the HOST_CALLBACK Trigger a message telling the user to configure his Windows Path manually, to open the file.
The point is that using only the first function i cannot find a way to open a message to the user to indicate him to configure his computer if it needs it, and using the second one the trigger comes out even if it needs it or not.
In a thread before (How to get the Windows Path i try to get the windows path to know if the user's computer needed to be configured or not, so i could put a message without any problem, but as the thread say, I cannot find the way to do it.
Please, tell me something... I am starting to have a headache.
Message was edited by:
abladb

Answer 1

This is what i was looking for. This works!!!. Thanx for reading anyways.
declare
p_modo Varchar2(50);
p_aplicacion varchar2(50) := 'AcroRd32';
fname VARCHAR2(200); -- = absolute rute of the file
pid WEBUTIL_HOST.PROCESS_ID;
begin
l_cadena := 'CMD /C ' || p_aplicacion || ' ' || fname;
IF p_modo = 'NONBLOCKING_WITH_CALLBACK' THEN
pid := WEBUTIL_HOST.NONBLOCKING_WITH_CALLBACK(l_cadena, 'HOST_CALLBACK');
-- Nota: HOST_CALLBACK es un trigger que tendremos que tener definido en el form.
Synchronize;
          DECLARE
          v_error_salida WEBUTIL_HOST.output_array;
          BEGIN
          v_error_salida := WEBUTIL_HOST.Get_Standard_Error(pid);
          message(v_error_salida(1));
Synchronize;
          message('Puede que sea necesario configurar su equipo. Consulte la ayuda de nuestra aplicación (?).');
          EXCEPTION
          When Others Then
          -- Cuando no existen errores en el proceso activo, la variable v_error_salida no va informada,
          -- produciendose un error al ser llamada en Pon_Nota(v_error_salida(1));
          Null;
          END;