4 Easy questions from a beginner to help add to your Post Count

Thank you.

I'm giving examples of how you would do the same thing in VB to make the questions clearer.

1) How do I append a Null to a string? (VB: 'strX & vbNull')
2) How do I generate a random number? (VB: 'Rnd')
3) How do I redraw evrything on the form automatically (you know without having to put everything in WM_PAINT (Do I set CS_SAVEBITS to the WNDCLASSEX thing to pass to RegisterClassEx or is ther a better way)? (VB: 'Me.Autoredraw = True')
4) Is there a way to create a static variable (local to a function)? (VB: 'Static MyVar As Long')

Sorry for my complete ignorance (I started C++ a few days ago). I know I'm ambitious, but the more I'm told, the more I learn. ;)

Thank you all. But not you in particular.

1. Strings are by default null-terminated in C++. For example, these do pretty much the same thing. They are different, though, in a very complicated, low-level way.

Code:

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char* mystring = "My Str";
char mystring[] = {'M', 'y', ' ', 'S', 't', 'r', '\0');

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2. I think there's a rand() function defined in stdlib.h

3. I don't know.

4. Just use static:

Code:

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void myfunc(int iNum) {
    static int myInt;
    myInt += iNum;
}

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Use the RedrawWindow or UpdateWindow function.
Also, keep in mind that redrawing is painting it.

I think that for the AutoRedraw stuff, VB itself stores the bitmap and blits that back again, rather than anything in the API.

Quote:

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Originally posted by parksie
I think that for the AutoRedraw stuff, VB itself stores the bitmap and blits that back again, rather than anything in the API.

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That's what CS_SAVEBITS does (saves a bitmap and then puts it back)

Thank you, bozos, you've helped a lot. You'll see. One day I'll be able to do something without having to look through MSDN, and then post a quetion here if I can't find it there.

Quote:

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Originally posted by, well, me
One day

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multos grazias