Problem in message of CWPSTRUCT

Question

1.00/5 (2 votes)

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lParam [in]
Type: LPARAM

A pointer to a CWPSTRUCT structure that contains details about the message.

Why Message in CWPSTRURCT Return Only 0 Not 3 Or 5

What I have tried:

Win64
CopyMemory Cwp,lparam,LenB(Cwp)
Debug.Print Cwp.Message
Zero Only
if use ByVal lParam , Crash App

Posted 30-Jan-22 1:45am

Member 11803607

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Comments

OriginalGriff 30-Jan-22 8:16am

This is not a good question - we cannot work out from that little what you are trying to do.
Remember that we can't see your screen, access your HDD, or read your mind - we only get exactly what you type to work with - we get no other context for your project.
Imagine this: you go for a drive in the country, but you have a problem with the car. You call the garage, say "it broke" and turn off your phone. How long will you be waiting before the garage arrives with the right bits and tools to fix the car given they don't know what make or model it is, who you are, what happened when it all went wrong, or even where you are?

That's what you've done here. So stop typing as little as possible and try explaining things to people who have no way to access your project!

Use the "Improve question" widget to edit your question and provide better information.

Richard MacCutchan 30-Jan-22 8:32am

Whatever it is you are trying to do (as with all the other questions) you are largely wasting your time. Trying to use Win32 functions from VBA is difficult at best, and in some cases impossible. Switch to C, C++ or C# and you will be able to solve your problems much faster.

And the fact that you have never explained exactly what problems you are trying to solve, means that the answers we can give are very limited in their usefulness.

OriginalGriff 30-Jan-22 9:53am

It's surprising how many people think we can read their minds, but they still come here - even with browser histories no-one sane would want to touch! :laugh:

Richard MacCutchan 30-Jan-22 10:16am

Too true, and I don't really know why I still am surprised.

Richard MacCutchan 30-Jan-22 9:18am

The CWPSTRUCT has nothing to do with the CopyMemory function.

[no name] 30-Jan-22 10:41am

So , always no need to screen anything
CWPSTRUCT Sould Not Be show the lparam Message in any case?

Richard MacCutchan 30-Jan-22 10:48am

As I mentioned above, we have no idea what problem you are trying to solve. Without much more information it is impossible to give an answer.

[no name] 31-Jan-22 10:35am

When Hooking and use WH_CBT
Function WindowHook(ByVal ncode As Long,ByVal wparam As LongPtr,ByVal lparam As Longptr) As LongPtr
i wrote
CopyMemory CWP,lParam,Len(CWP)
Debug.Print CWP.Messeage
End Function
=0 Only That it is returen 3 Or 5

Richard MacCutchan 31-Jan-22 10:49am

Sorry, that means nothing, and I still have no idea what you are doing. Just dumping these few lines of code without any context makes it almost impossible to guess what is going on.

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