How do I find full path to an application in a batch script

Question

How do I in a batch script find the full path to application XYZ if it is installed

Clarifications:

1. The application is not in the PATH
2. All I h

Answer 1

This is the closest I got. One drawback is that it works only for one drive per execution, but that could made more flexible. Another is the output, that always contains a // between the path and the filename. But per definition thats a valid path.

@ECHO OFF

SET filename=autoexec.bat

FOR /R C:\ %%a IN (\) DO (
   IF EXIST "%%a\%filename%" (

      SET fullpath=%%a%filename%
      GOTO break
   )
)
:break

ECHO %fullpath%

Will deliver: C:\\autoexec.bat

EDIT:

For explanation, the for loop iterates through all directories starting at the given path (C:\) and check if the filename exists in that directory. If so, both variables are concatenated and stored in %fullpath% and the loop is terminated by a jump.