一个关于COM接口的很简单的问题，高手们闭着眼睛都可以回答的

[ajet]

只知一个Interface的GUID为"6C44DF74-72B9-4992-A1EC-EF996E0422D4"，其它的什么都不知道的情况下，怎么得到它的CComPtr指针？请指教，谢谢！

[volcary]

1.在HKEY_CLASSES_ROOT\Interface\ 找到
项“6C44DF74-72B9-4992-A1EC-EF996E0422D4”
2.在其项TypeLib下找到GUID是CLSID
3.在HKEY_CLASSES_ROOT\CLSID\ 找到 该CLSID_GUID其中
如果是进程外则找\localserver其中就是本地COM组件
如果是进程内找\InProcServer32
4.注册你的DLL yourcom.dll -regserver32
5.#import "youcom.dll" no_namespace
6.定义 yourcomclassPtr cominter
7.cominter.cocreateinstance()
......//调用
8.cominter.Release();

[ajet]

volcary((冰火山):
我在导出类型库时出错,我是想导出MICROSOFT TTS 引擎的,在StdAfx.h中加入
#import "C:\Program Files\Common Files\Microsoft Shared\Speech\sapi.dll" no_namespace
后编译出错,提示如下:
Compiling...
StdAfx.cpp
d:\abcddd\b\stdafx.h(23) : warning C4192: automatically excluding 'wireHWND' while importing type library 'C:\Program Files\Common Files\Microsoft Shared\Speech\sapi.dll'
d:\abcddd\b\stdafx.h(23) : warning C4192: automatically excluding '_RemotableHandle' while importing type library 'C:\Program Files\Common Files\Microsoft Shared\Speech\sapi.dll'
d:\abcddd\b\stdafx.h(23) : warning C4192: automatically excluding '__MIDL_IWinTypes_0009' while importing type library 'C:\Program Files\Common Files\Microsoft Shared\Speech\sapi.dll'
d:\abcddd\b\stdafx.h(23) : warning C4192: automatically excluding 'IStream' while importing type library 'C:\Program Files\Common Files\Microsoft Shared\Speech\sapi.dll'
d:\abcddd\b\stdafx.h(23) : warning C4192: automatically excluding 'ISequentialStream' while importing type library 'C:\Program Files\Common Files\Microsoft Shared\Speech\sapi.dll'
d:\abcddd\b\stdafx.h(23) : warning C4192: automatically excluding '_LARGE_INTEGER' while importing type library 'C:\Program Files\Common Files\Microsoft Shared\Speech\sapi.dll'
d:\abcddd\b\stdafx.h(23) : warning C4192: automatically excluding '_ULARGE_INTEGER' while importing type library 'C:\Program Files\Common Files\Microsoft Shared\Speech\sapi.dll'
d:\abcddd\b\stdafx.h(23) : warning C4192: automatically excluding 'tagSTATSTG' while importing type library 'C:\Program Files\Common Files\Microsoft Shared\Speech\sapi.dll'
d:\abcddd\b\stdafx.h(23) : warning C4192: automatically excluding '_FILETIME' while importing type library 'C:\Program Files\Common Files\Microsoft Shared\Speech\sapi.dll'
d:\abcddd\b\debug\sapi.tlh(3515) : warning C4129: 'S' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3515) : warning C4129: 'M' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3515) : warning C4129: 'S' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3516) : warning C4129: 'S' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3516) : warning C4129: 'M' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3516) : warning C4129: 'S' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3517) : warning C4129: 'S' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3517) : warning C4129: 'M' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3517) : warning C4129: 'S' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3517) : warning C4129: 'A' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3518) : warning C4129: 'S' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3518) : warning C4129: 'M' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3518) : warning C4129: 'S' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3518) : warning C4129: 'A' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3519) : warning C4129: 'S' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3519) : warning C4129: 'M' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3519) : warning C4129: 'S' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3519) : warning C4129: 'V' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3520) : warning C4129: 'S' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3520) : warning C4129: 'M' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3520) : warning C4129: 'S' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3520) : warning C4129: 'R' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3521) : warning C4129: 'S' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3521) : warning C4129: 'M' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3521) : warning C4129: 'S' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3521) : warning C4129: 'A' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3522) : warning C4129: 'S' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3522) : warning C4129: 'M' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3522) : warning C4129: 'S' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3522) : warning C4129: 'P' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3523) : warning C4129: 'S' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3523) : warning C4129: 'M' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3523) : warning C4129: 'S' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3523) : warning C4129: 'R' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3524) : warning C4129: 'S' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3524) : warning C4129: 'M' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3524) : warning C4129: 'S' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3524) : warning C4129: 'C' : unrecognized character escape sequence
d:\abcddd\b\debug\sapi.tlh(3551) : warning C4305: 'initializing' : truncation from 'const double' to 'const float'
d:\abcddd\b\debug\sapi.tlh(4511) : error C2011: 'IServiceProvider' : 'struct' type redefinition
d:\abcddd\b\debug\sapi.tlh(6132) : warning C4146: unary minus operator applied to unsigned type, result still unsigned
d:\abcddd\b\debug\sapi.tlh(6695) : error C2039: 'RemoteQueryService' : is not a member of 'IServiceProvider'
c:\program files\microsoft visual studio\vc98\include\servprov.h(108) : see declaration of 'IServiceProvider'
Error executing cl.exe.
Creating browse info file...

b.exe - 2 error(s), 49 warning(s)

[maphis]

有重定义发生，你可以去掉no_namespace参数，这样你使用的时候注意要加上namespace就可以了。

[ajet]

maphis(bool bPoor=true) :谢谢你，谢谢你，太感谢你了！！！（真想亲你一口）

[ultraboy]

其他什么都不知道，你得到指针能干嘛？

[ajet]

到底能不能得到？

[maphis]

你如果不知道CLSID的话，那么就意味着不能创建相应的实例，所以当然不能得到。

相关原理可以看看讲COM的书。