LPMALLOC, IMalloc problems.

I am using SHBrowseForFolder (function), BROWSEINFO (structure), SHGetMalloc(function), and LPMALLOC(structure) to ask the user to select a folder. But when I try to free the memory allocated by SHGetMalloc, I get this error:

Code:

error C2039: 'Free' : is not a member of 'IMalloc'
        c:\program files\microsoft sdk\include\objidl.h(1103) : see declaration of 'IMalloc'

Here is my code:

Code:

	case IDC_CLICK_OPENDIR:
		{
			char x[MAX_PATH];
			BROWSEINFO binfo;
			HRESULT HR;
			LPITEMIDLIST idList = 0;
			LPMALLOC pMalloc;

			HR = SHGetMalloc(&pMalloc);

			if(FAILED(HR))
			{
				MessageBox(hWnd, "shgetmalloc failed.", "error", MB_OK);
				return;
			}

			binfo.hwndOwner = hWnd;
			binfo.pszDisplayName = x;
			binfo.ulFlags = BIF_USENEWUI;
			binfo.lpfn = NULL;
			binfo.pidlRoot = 0;
			binfo.lpszTitle = "Title Here";
			binfo.lParam = 0;

			idList = SHBrowseForFolder(&binfo);

			SHGetPathFromIDList(idList, x);

			SetDlgItemText(hWnd, IDC_EDIT_FILETOSAVE, x);

			pMalloc->Free(idList);//ERROR here.
			break;
		}

lil help please, thanks

Your code seems fine and compiles and runs ok with me (msvc6 aug2001psdk, win2k).

Try:

Deleting all temporary files and doing a complete rebuild -sometimes msvc can be a bit temperamental.

Check objidl.h line 1103 referred to in the error msg to see what the header has to say for itself - is Free defined for IMalloc?

Here is the some of the code for IMalloc in objidl.h:

Code:

    typedef struct IMallocVtbl
    {
        BEGIN_INTERFACE
        
        HRESULT ( STDMETHODCALLTYPE *QueryInterface )( 
            IMalloc * This,
            /* [in] */ REFIID riid,
            /* [iid_is][out] */ void **ppvObject);
        
        ULONG ( STDMETHODCALLTYPE *AddRef )( 
            IMalloc * This);
        
        ULONG ( STDMETHODCALLTYPE *Release )( 
            IMalloc * This);
        
        void *( STDMETHODCALLTYPE *Alloc )( 
            IMalloc * This,
            /* [in] */ SIZE_T cb);
        
        void *( STDMETHODCALLTYPE *Realloc )( 
            IMalloc * This,
            /* [in] */ void *pv,
            /* [in] */ SIZE_T cb);
        
        void ( STDMETHODCALLTYPE *Free )( 
            IMalloc * This,
            /* [in] */ void *pv);
        
        SIZE_T ( STDMETHODCALLTYPE *GetSize )( 
            IMalloc * This,
            /* [in] */ void *pv);
        
        int ( STDMETHODCALLTYPE *DidAlloc )( 
            IMalloc * This,
            void *pv);
        
        void ( STDMETHODCALLTYPE *HeapMinimize )( 
            IMalloc * This);
        
        END_INTERFACE
    } IMallocVtbl;

    interface IMalloc
    {
        CONST_VTBL struct IMallocVtbl *lpVtbl; //ERROR POINTS HERE
    };

line 1103 is where the interface starts.

Free sure looks like a member of IMalloc to me.

I deleted all the temp files, didn't work. Are you using a .c or .cpp file to check my code? I'm doing this all in C.

Thanks for your help.

>>Are you using a .c or .cpp file to check my code? I'm doing this all in C.<<

Good point - cpp so i'm compiling as C++ while yours should compile as C. The calling convention for COM is different between the two, so you could try:

Code:

pMalloc->lpVtbl->Free(pMalloc,idList);

instead of 'pMalloc->Free(idList);' and see if that works out.

woot! BIG woot! problem solved. thanks Ken! = )