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[Tutorial]Using GetAsyncKeyState With Shift, etc. {EASY}
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kitterz
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Posted: Sat Dec 06, 2008 5:09 pm Post subject:

rapion124 wrote:

If you don't know the C++ operators, you don't deserve to be called a C++ programmer. I bet most of you don't know whether '&&' is bitwise or logical o_O

&& is logical AND
& is bitwise AND
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Overload
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Posted: Sat Dec 06, 2008 7:37 pm Post subject:

rapion124 wrote:

If you don't know the C++ operators, you don't deserve to be called a C++ programmer. I bet most of you don't know whether '&&' is bitwise or logical o_O

I bet many of us do, and even more don't. There are lots of operators most new C++ programmers don't know about.
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Anden100
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Posted: Sun Dec 07, 2008 2:23 am Post subject:

rapion124 wrote:

If you don't know the C++ operators, you don't deserve to be called a C++ programmer. I bet most of you don't know whether '&&' is bitwise or logical o_O

Its logical right?
and '&' is bitwise right?

edit:
kitterz allread posted...

FerrisBuellerYourMyHero
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Posted: Mon Dec 08, 2008 11:58 am Post subject:

HolyBlah wrote:

Anden100 wrote:

Code:

if (GetAsyncKeyState(VK_SHIFT) && GetAsyncKeyState(VK_F1))

Try to press "F1" and then let it go again, then press "Shift", and it will use the hotkeys, you dont need to press them at the same time Wink

That's because "GetAsyncKeyState" doesn't return true or false.
@threadstarter: You should add "&& 0x8000" to the if so it will return TRUE only when both keys are down Wink

actually you mean "& 0x8000"! as people have stated in here, single "&" is bitwise, and double "&&" is logical... same with "|" && "||" Wink

bitwise is like you would do in assembly

&:

Code:

and eax, 0x539

Code:

or eax, 0x3419

And I think you know what logical is...

Anyway HolyBlah is right. I had this same problem before, where both keys did not have to be pressed simultaneously. Just so long as all the keys were pressed at some point. I overcame this issue by using the & 0x8000 like anden mentioned...

Here's an example. Say you wanted to tell the difference between a regular F1 press, && an F1 press with control[VK_CONTROL] being held down... So that you can enable a certain hack with just F1 pressed by itself, && a different hack when F1 && control are both being pressed at the same time.

So for your regular F1 press, you want to first make sure control isn't currently down, and if its not then check if F1 is down.

Code:

if(((GetAsyncKeyState(VK_CONTROL) & 0x8000) == 0) && (GetAsyncKeyState(VK_F1) < 0))

So if control is not down AND F1 is down, then the code in the if statement will run...

you could also do it like:

Code:

if(((GetAsyncKeyState(VK_CONTROL) & 0x8000) == 0) && (GetAsyncKeyState(VK_F1) & 0x8000))

but its shorter to just do < 0

then for the F1 press with control being held down you can probably figure that out knowing the above but its like this...

Code:

if((GetAsyncKeyState(VK_CONTROL) & 0x8000) && (GetAsyncKeyState(VK_F1) < 0))

if control is down AND F1 is down, execute code...

the way the operators are is important, if the && was wrongly made bitwise & it would not work right!
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tombana
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Posted: Mon Dec 08, 2008 12:33 pm Post subject:

if( GetAsyncKeyState(KEY) & 0x8000 ) is the same as if( GetAsyncKeyState(KEY) < 0 ) right? (Because it returns a signed short, so when the highest bit (0x8000) is set it will be less than zero so that's the same) If it GetAsyncKeyState would return an unsigned short it would be different.

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