Use of HTREEITEM in /Clr

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Use of HTREEITEM in /Clr

HI,
When compiling an app that uses HTREEITEM i get an error complaining about _TREEITEM - _TREEITEM does not seem to be defined.

I am currently trying to see if this will work:
typedef struct TVITEM *HTREEITEM;




Any hints on how to get around this


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Use of HTREEITEM in /Clr

  • Toomy Ling

    You didn't paste in the error message you are seeing.
    commctrl.h contains this typedef:
        typedef struct _TREEITEM *HTREEITEM;
    This is why you are seeing _TREEITEM in the diagnostic.

    I'm just guessing: Make sure that something important isn't being exclude because there is a #define WIN32_LEAN_AND_MEAN in your source code. Wizard generated projects put this in stdafx.h.

  • Doyle J.

    I can confirm that the use of typedef _TREEITEM {}; solved that problem.

    I have not tried fiddling with the Lean and Mean def's as it seems inconsistent to do so. If afxcmn.h is included then the typedef above should occur regardless.

    The code uses #define VC_EXTRALEAN - it is quite diverse, but is mainly client side DBMS using ODBC with common controls.

    Thanks...
    - Tim

  • Glj12

    The problem is because struct _TREEITEM{} is not defined in the common
    control header files.
    To fix the problem define the following in your stdafx.h

    struct _TREEITEM
    {};

    More info:
    HTREEITEM is defined as typedef struct _TREEITEM* HTREEITEM; for typesafety.

    In native C++, not having struct _TREEITEM define is not a problem, but the CLR
    needs an actual definition for a type even when just creating a pointer to it.

    Ronald Laeremans
    Visual C++ team

  • Don Mylrea

    Thanks for the answer.
    I'll try it tomorrow and get back.

  • Use of HTREEITEM in /Clr
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