How to Use?

DWG Compare ActiveX Control

DWGCompareX, a standalone ActiveX control for comparing dwg is available for developers.

Steps to use this control

Step 1 Please download the program according to your own requirement


Step 2 Please unzip the program to the destination folder

Step 3 Register the control

Open the program folder and double click the file reg.bat to register the CompareDWGX.ocx. If you run Win7 and the reg.bat file cannot work, please click start button>>All programs>>Accessories, then find the "Command Prompt" and right click it to choose "Run as Administrator" option to open the command prompt, then try to use the command regsvr32 to register CompareDWGX.ocx.

Step 4 Do a test

Prior try out the active-x program with your own application, please try to give it a very first test with demo.html in IE, please make sure it will work as expected and then try out with other environments.

Help For Developers

Sample Code (in VB) for your reference:

Dim objImage
Set objImage= CreateObject("AutoDWGCompare.CompareDWG")

objImage.Compare "version1.dwg","version2.dwg"

Sample Code (in VC) for your reference:

#import "D:\\AutoDWGCompare\\CompareDWGX.ocx" named_guids rename_namespace("AutoDWGCompare")

CString str1, str2;

CComPtr<AutoDWGCompare::ICompareDWG> conv;
HRESULT hResult = conv.CoCreateInstance(AutoDWGCompare::CLSID_CompareDWG);

str1 = m_strInputFile1;
str2 = m_strInputFile2;
conv->raw_Compare(str1.AllocSysString(), str2.AllocSysString());


     dll registration failed, how to fix it?
     Will this software work with 64 bit computer?

     Do you offer customized service?

     How to update the product?
     How to download the old program?

     How do I complete activation or registration?
     What shall I do, if the registration code is invalid?
     How do I retrieve the registration code of the latest version for reinstall?
     How do I get a new registration code with my upgrade?
     What to do if I fail to download/install the product on PC?
     How to transfer my license to a new PC?
     How to uninstall your program?
     Do I need to buy an additional seat to use this both at home and at work?

     What is your policy on refunds?
     What is your policy on Licenses?
     What is your Upgrade Policy?
     What is a "1-Year Free update"?
     If I purchased a single-user license, can I use the program on another computer?
     Can I get technical support for my Free Trial?
     What does download protection service mean?
     Can I try your products before I buy them?
     Is my purchase on your Website secure?
     Where can I find a safe discount program for your products?
     After I submit a ticket, how long before Support replies to me?
     Can I get your products on CD?

     How do I get an invoice or receipt?
     How to change license email if there is typo when I place the order?
     Can I cancel my order after placing it?
     If I buy the wrong product by mistake, can I exchange it?
     How will you tell me if my order was processed?
     Why I haven't received the refund yet?
     Do you charge VAT on my purchase?
     How do I get a refund of taxes paid?
     How do I pay for my purchase with my credit card or bank card?
     Why was the website price and what I paid different?
     How do I fix a "double charge"?
     What ways can I pay for my purchase?
     How to get a refund of Download Protection Service separately?


System Requirements:

OS:Compatible with XP, Vista, Win7, Win8, Win10
RAM: 1024MB or greater, executable program takes 27Mb, loaded with a drawing file will take more RAM depends on the size of drawing file.
HD: 40MB free hard drive spaces to install

Technical Support:

Free technical support is available to all customers, any question please contact:


You’ll enjoy one year free update service since you buy the software. After expiry, you can continue using the software but no more updates will be available unless you purchase.

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