I read some code of TortoiseSVN and TortoiseHg Code. 
At beginning, TortoiseGit can git command to get information like Qgit.
After linkable library ready, replace "git command". 

I think TortoiseGit can start base on below way.
 
1.  Base on TortoiseHg, It is python Script.  Replace below hg operator
with Git. 
2.  Base on TortoiseSVN, It is developed with C++. Need VS2008.
ToritoiseSVN provide some built in diff and merge tools. 
3.  Base on Qgit, which provide some basic UI, such comment dialogbox,
history view and file annotate. 


Best regards
Frank Li

-----Original Message-----
From: git-owner@vger.kernel.org [mailto:git-owner@vger.kernel.org] On
Behalf Of Scott Chacon
Sent: Friday, October 31, 2008 11:58 PM
To: Andreas Ericsson
Cc: Ian Hilt; Li Frank-B20596; git@vger.kernel.org
Subject: Re: why not TortoiseGit

I'm trying to get this restarted - dscho and I talked about this at the
GitTogether, and I met some people (from the OpenAFS project that also
happened to be there, oddly) who were interested in working on this with
me.  I think the lack of a linkable library has greatly hindered the
development of projects like this, so that will likely be part of the
development process as well.

Scott

On Fri, Oct 31, 2008 at 5:35 AM, Andreas Ericsson <ae@op5.se> wrote:
quoted text
> Ian Hilt wrote:
>>
>> On Fri, Oct 31, 2008 at 09:44:45AM +0800, Li Frank-B20596 wrote:
>>>
>>> There are TortoiseCVS, TortoiseSVN, TortoiseBzr, TortoiseHg Why not 
>>> ToroiseGit
>>
>> This is what Johannes Schindelin had to say,
>>
>>        <http://code.google.com/p/msysgit/wiki/GitCheetah>
>
> Noone's written TortoiseGit yet. I have no idea why, and I have no 
> reason to write it myself. If GitCheetah isn't working well, I'm sure 
> patches are welcome.
>
> --
> Andreas Ericsson                   andreas.ericsson@op5.se
> OP5 AB                             www.op5.se
> Tel: +46 8-230225                  Fax: +46 8-230231
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