Macros from Win32.hlp

[Jimg]

Ok, time for the next dumb question.

When using the win32.hlp file, there is often mention of macros that are available.  For example-

The LVM_SETITEMSTATE message changes the state of an item in a list view control. You can explicitly send this message or by using the ListView_SetItemState macro.

I've always used sendmessage but in the back of my mind, I always meant to find out how to use these macros.  What is the exact form of the line of assembler to call this macro?  My first guess would be-

Code Select Expand

ListView_SetItemState hLv,ebx,ecx,LVIF_STATE

but masm hates that.  Second, third, and fourth guesses were no better.  Is this just some leftover 'C' junk or can we actually use these macros?

[Vortex]

There is no such a macro in Masm but you can build it. Probably, it's a construct related to C

[hutch--]

Jim,

You would need to work out the actual API call required to do what you are after. It certainly is a target for writng a macro but you need the technical data to do it first.

[Jimg]

Thanks all, that is what I suspected.  It's just irritating to constantly have these references to non-existant macros or at least not knowing weither they exist or not.  Thanks again, I'll just ignore the references.  Perhaps we need to create our own asm-centric win32.hlp :wink

[PBrennick]

Jimq,
What would we do?  Decompile the help file, search and delete all references to the word 'macro' and then recompile it?  :green2

Paul

[Jimg]

Among other things, yes!

I've already done this once, just to get the "find" button to show up.

[PBrennick]

Jimq,
Do you mean it defaults to find?  That is something I never thought of and is very useful.  It is the only tab I every use.

Paul

[Jimg]

Well, not defaults to find exactly, but the find button is always available, so that you don't have to hit index first to get to the find screen.

[PBrennick]

Jimq,
Oh, yeah, that is irritating.  Maybe I will do the same thing.

Paul

[GregL]

ListView_SetItemState Macro

It's in 'commctrl.h'.

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#define ListView_SetItemState(hwndLV, i, data, mask) \
{ LV_ITEM _ms_lvi;\
  _ms_lvi.stateMask = mask;\
  _ms_lvi.state = data;\
  SNDMSG((hwndLV), LVM_SETITEMSTATE, (WPARAM)(i), (LPARAM)(LV_ITEM *)&_ms_lvi);\
}


As stated above, you would have to translate it to a MASM macro.

[Jimg]

Thanks Greg.  So it is pure 'C' stuff then.

[hutch--]

Jim,

Give this a blast as it may do the job. I have no code set up to test it but it just loads the structure and does a SendMessage().

Code Select Expand


    ListView_SetItemState MACRO handl,i,data,mask
      IFNDEF @lvi@
      .data?
        @lvi@ LV_ITEM <>
      .code
      ENDIF
      mov eax, mask
      mov @lvi@.mask, eax
      mov eax, data
      mov @lvi@.data, eax
      invoke SendMessage,handl,LVM_SETITEMSTATE,i,ADDR @lvi@
    ENDM


[PBrennick]

Hutch,
If I read that script from the header file correctly, what I see is a generic SendMessage macro that can be used to send ANY message.  That would be a very powerful addition to your preprocessor set.  Very easy to create, also.

Paul

[Jimg]

Very nice Hutch.

Thanks everybody.  If you look at the first post, that macro was just an example, something I happened to be looking at just then, not a particular macro I needed.  I just wanted to know about the macros described in win32.hlp in general, and I now have the answer, ignore them!