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Many says COM works just like DLL , Then Why COM is needed, Can any one give me the advantages of COM against DLL concepts..

When ActiveX controls is developed through ATL it is packed into DLL, When developed using MFC ActiveX Appwizard It is packed into ocx file, So , My question is When should we pack in OCX, when in DLL. Can any one guide me....

On WinNT 4.0, I am able to perform Brightness and Contrast operations on a Bitmap Image (rendered by StretchBlt()) using SetColorAdjustment() and GetColorAdjustment() APIs, These APIs are valid for winnt and windows2000 only. But I want same functionality on Windows 98, How..?, Anybody can help...

I developed one Container to Host Ole objects and ActiveX controls, using VC++ 6.0. After inserting a control, a big image of inserted control is appearing along with it's original image( drawn by control's Draw() method ). How to remove this default image ...?

CTime time; time.CTime::GetCurrentTime(); //above statement is passed through the compiler //but no errors or warnings have been issued //I was compiling with Visucal C++ 6.0

I encapsulated Micosoft Flex grid control in a class derived from CStatic class.This control is working well in all the systems with visual studio installed in them.However if the same object is used in the system with out visual studio, the grid creation is failing.We also registered the...

How to create a window less control which can process windows messages

I want to use reference variable as a datamember in a c++ class,but during the compilation it is showing an error: &quot;refence member requires an initializer..&quot; Program i wrote is: #include <iostream.h> extern int pub; class ex { int &data; public: ex() { data=::pub; } }; int...