Bulid Error Help

Hi, here is a source file about RFID - VC(exe, header and cpp)
I wanna edit it by VC++ and VS , but it says:

Code:

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MifareOneDemoDlg.obj : error LNK2001: unresolved external symbol "public: virtual __thiscall CHexEdit::~CHexEdit(void)" (??1CHexEdit@@UAE@XZ)
MifareOneDemoDlg.obj : error LNK2001: unresolved external symbol "public: __thiscall CHexEdit::CHexEdit(void)" (??0CHexEdit@@QAE@XZ)
MifareOneDemoDlg.obj : error LNK2001: unresolved external symbol "public: void __thiscall CHexEdit::SetLimitTextEx(unsigned int)" (?SetLimitTextEx@CHexEdit@@QAEXI@Z)
MifareOneDemoDlg.obj : error LNK2001: unresolved external symbol "public: void __thiscall CHexEdit::SetWindowTextEx(unsigned char *,int)" (?SetWindowTextEx@CHexEdit@@QAEXPAEH@Z)
MifareOneDemoDlg.obj : error LNK2001: unresolved external symbol "public: unsigned int __thiscall CHexEdit::GetTextLenEx(void)" (?GetTextLenEx@CHexEdit@@QAEIXZ)
MifareOneDemoDlg.obj : error LNK2001: unresolved external symbol "public: void __thiscall CHexEdit::GetWindowTextEx(class CString &)" (?GetWindowTextEx@CHexEdit@@QAEXAAVCString@@@Z)
Debug/MifareOneDemoDlg.exe : fatal error LNK1120: 6 unresolved externals

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I don't know why because i dont' have many C++ knowledge.
And the code will be used in my project, it's quite urgent..
Can some one help me to fix it?
Thank a lot!

The root of the problem is that the linker cannot find definitions or implementations of said functions.
What causes this problem can be a number of things. If you have many source files, did you add them all to the project, for example?

Quote:

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Originally Posted by Elysia

The root of the problem is that the linker cannot find definitions or implementations of said functions.
What causes this problem can be a number of things. If you have many source files, did you add them all to the project, for example?

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The header files had been added into the cpp file.
Is there any thing i need to do to add them to the project?

All the source files need to be added to the project.

Quote:

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Originally Posted by Elysia

All the source files need to be added to the project.

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OH..ic...i was just trying to edit the cpp file.
now i need to create a project,what type should i choose?Win 32 console application?

You probably want a Win32 application.

Quote:

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Originally Posted by Elysia

You probably want a Win32 application.

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OK,i create a project 'Test', and it says

Code:

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LINK : fatal error LNK1104: cannot open file "Debug/TEST.exe"
Error executing link.exe.

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what happened?

Can you copy paste the build log?

Quote:

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Originally Posted by Elysia

Can you copy paste the build log?

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I create the new project and change the directory,it works now.
And finally it alerts me " Load MasterCom.dll failed"...

Sounds like the code relies on some 3rd party dlls. You need to put those in the same directory as your executable.

Quote:

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Originally Posted by Elysia

Sounds like the code relies on some 3rd party dlls. You need to put those in the same directory as your executable.

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THANK YOU SO MUCH!!!!!
it works!!
Thank a lot!

No problem.