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

The answers I got from others worked (but slow or used extra files) and worked for any exe but didn't really suit my needs.

Since I wanted to find a particular exe I went looking in the registry using REG QUERY instead. I found a key that contained the data I wanted to find and extracted that.

The result is fast, has few lines of code but is not very pretty nor reusable.

Short example:

@ECHO off
SETLOCAL
set found=
FOR /F "tokens=1-3 delims= " %%a IN ('REG QUERY "HKEY_CLASSES_ROOT\Applications\ISTool.exe\shell\OpenWithISTool\command"') DO (
 set found=%%c
)

for /f "tokens=1-2" %%a in ("%found%") do (
 set my_exe=%%a
)
echo %my_exe%
ENDLOCAL

This results in "C:\Program\ISTool\ISTool.exe" (with quotes)
Note: delims= above is followed by a tab-char