To generate the file MfcDlgDll.res, please launch your Visual Studio.
Use menu File > Open > File...
Open the file MfcDlgDll.dll
Then use menu File > Save MfcDlgDll.dll As...
Select Save Type as "32-bit Resource File(*.res)"
Then just add the file MfcDlgDll.res into your project.

For more help, please visit http://www.dll-decompiler.com