How to color the category in outlook?

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VC6

C++

I am using the code to synchronize outlook and my application. Everything works fine.
Am using the following code to paint the color in a box in my application.
I would like to give the same color to the outlook appointment as the appointment is created by my application.

hDC = GetDC(hCtrl);
GetClientRect (hCtrl, &rect);

lbrush.lbStyle = BS_SOLID;
lbrush.lbColor = (tempact.color) ? tempact.color : GetProjectColor(project);
lbrush.lbHatch = HS_VERTICAL;

hOldBrush = (HBRUSH)SelectObject(hDC, CreateBrushIndirect(&lbrush));

This code paints the box in the application. How to get the same color (user defined) and add to the corresponding appointment in the outlook?