Detection of OCX File
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Hi all, I have a problem. I have written a program that uses a commercial activeX component. I need to distribute this program on other machines and in order to do that I need to also distribute the commercial .ocx file and register it. This is no problem. What I want to do is for my program to send a popup error message if the ocx file is not installed/registered with windows. Currently it just crashes. X| thanks ---
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Hi all, I have a problem. I have written a program that uses a commercial activeX component. I need to distribute this program on other machines and in order to do that I need to also distribute the commercial .ocx file and register it. This is no problem. What I want to do is for my program to send a popup error message if the ocx file is not installed/registered with windows. Currently it just crashes. X| thanks ---
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bryce wrote: why not do a cocreateinstance and catch any errors/exceptions Ok How do I do that???? ---
You can create an object of your control using COM techniques:
HRESULT hr = CoCreateInstance( CLSID_YourControlID, NULL, CLSCTX_INPROC_SERVER, IID_IYourControlInterface, (void**)&pInterfaceName); if (FAILED(hr)) { MessageBox( NULL, ”Failed to create instance of “ “Your Control”, ”Error!”, MB_ICONERROR); }For that you need to know the basics of COM. MSDN is a good source of learning so read about the basics of COM. All the best!! ;) @!$h@ -
It crashes at
TRY { CModelessMain::Create(...) } CATCH_ALL { ... } END_CATCH_ALLNever tried CoCreateInstance - will give it a go ---Create()method returns aBOOL, If you have specified appropriate parameters, the method does not crash. So better check for your parameters. In case the control is not registered,Createreturns aFALSE. In this case, give user the message that control is not registered or installed. @!$h@