Hi, I am trying to make a function call with multiple parameters to a
dll, but I always get a type mismatch error. Strangely the error does
not happen if I pass a single parameter:


The two functions in my dll are:
Public Function testF(ByVal st As String) As Integer
MsgBox st
testF = 5
End Function

Public Function testF2(ByVal st1 As String, ByVal st2 As String) As
Integer
MsgBox st1, st2
testF2 = 100
End Function

The function calls I make are:

1. --no error----
Dim x, y As Integer
x = t.testF("testing")
MsgBox "x = " +  x

2. --- type mismatch error---
y = t.testF2("one", "two")
MsgBox "y= " + y

I tried calling the function different ways still I get the error
3. ---type mismatch error-----
y = t.testF2(st1:="one ", st2:="two")
MsgBox "y= " + y


So what am I doing wrong? Should I declare or call the function a
different way? Or is it possible that I can only pass one parameter to
a dll function?

Help please! I wasted days on this already....
Thank you very much.

Show quote Hide quote Then... you'll hate yourself when you find out where the error is coming
from <g>

You're passing 2 strings to the MsgBox function. It expects one string. The
second param for the MsgBox method tells it which buttons/icons to show.
'====
Private Sub Command1_Click()
   Call MsgBox("one", "two") 'Same error as you get
End Sub
'====

To show both params in one box, use:

MsgBox String1 & vbCrLf & String2

Thank you SO much -- this REALLY saved me - I was beginning to wonder
if I should think of alteranate ways, like concatenating all parameters
after converting all to the same type, and then splitting them inside
the function to extract the separate ones. Thank you again!!!

Ken pointed out the reason for the error but you should be aware that x is
being declared as a Variant in the above statement.  You need to specify the
type on all variables as in:
Dim x As Integer, y As Integer

Thanks for this tip also!!

Thanks for this tip also!!

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