我应该在Delphi中使用哪个版本的IMalloc？

Question

I'm trying to refactor a Delphi 5 project in Delphi XE, to do that I need to fix some errors in a unit called BrowseDr. The error I'm getting is

[DCC Error] BrowseDr.pas(1033): E2033 Types of actual and formal var parameters
 must be identical

line 1033:   SHGetMalloc(FShellMalloc);

"MyShlObj":

//SHGetMalloc declaration 
function SHGetMalloc(var ppMalloc: IMalloc): HResult; stdcall;

Now the IMalloc used in the declaration of FShellMalloc is derived from a OLE2.IMalloc while the one used in "MyShlObj" is from ActiveX.IMalloc .

Is it possible alter one of them? If yes, is it recommended?

Answer 1

旧版Delphi版本使用OLE2单元，此单元已被ActiveX单元替换，因此现在必须在新项目中使用ActiveX类型。

Answer 2

Check your uses clause. A lot of third party code uses compiler directives to load the correct unit. Changing Compiler version will often result in the wrong file being loaded.

DFS is a classic example. Go to DFS.INC and ensure an appropriate DFS_COMPILER_xxx is defined.

Answer 3

The only alteration I think will work is to make sure that FShellMalloc is derived from the same interface as the one used from MyShlObj.

Modify either one to use the same IMalloc as the other.