Windows API FindExecutable help!

[aru_aakash]

Hello Gurus,


I have following line of codes :

<code>

Function Exec(strFile As String) As String
    Dim strPath As String


    Dim ALen As Integer


    strPath = Space(255)


    ALen = FindExecutableA(strFile, "\", strPath)


    Exec = Trim(strPath)


End Function

</code>
The above UDF uses API call to FindExecutable function.

Query: Last line of code gives nothing to Exec function. But still on supplying the filename and path to this function, i am getting the executable file path.

Also i do not understand where ALen is used.

Please advise. As i am finding difficultly in understanding DLL's functions.

Thanks<code></code>

 

[sijpie]

see also:
FindExecutable function (Windows)

ALen = FindExecutableA(strFile, "\", strPath)
you pass the function the filename and a path, and an empty string to hold the application used to open the feilname.

so the if strFile = 123.xls, then FindExecutable will put Excel.exe in strPath

The function also returns a value, which is captured in ALen. In your example ALen is not checked. But you could check it for errors: if ALen is 32 or more then the function was successful, else there are a number of errors with different values (see link). For proper coding your function should do this, else the user may come up with some surprises