declare a SendMessage with ByVal parameters or ByRef

[Just Me]

I declare the following and use it if the msg returns values.

I also declare an SendMessage using ByVal for other calls.

Isn't there a way I can used the SendMessage and in the call tell it to use
ByRef?

Public Declare Auto Function SendMessageRef Lib "user32.dll" Alias
"SendMessage" (ByVal hWnd As IntPtr, ByVal msg As Integer, ByRef wParam As
Integer, ByRef lParam As Integer) As Integer

Thanks



PS

I once read a great internet site that explained in detail ByVal and ByRef
as applied to Value types and Reference types - but I've lost the URL.

Anyone know the address?

 

[Zoury]

Isn't there a way I can used the SendMessage and in the call tell it to
use

ByRef?

i guess.. what message are you planning to send ?
IIRC, if the message returns you a Structure via a parameter, than you can
pass the struct variable "ByRef As MyStruct" and it should get fill
automaticaly or you can pass it "ByVal As IntPtr" and then use the
Marshal.PtrToStructure() function as well.

 

[Just Me]

i guess.. what message are you planning to send ?

In this instance, just Integers that are to be returned


Thanks

 

[Zoury]

than declare the parameter ByRef.