How do I write multiple GetAsyncKeyState with C++ - c++

Question

My problem is where can I add this line of code:
if( GetKeyState(VK_F2) & 0x8000 )
I tried in different ways, but when I compile and run it and press the F1 or F2 key it executes all the functions. I want to call the F1 key functions when the key is pressed and F2 key when it is pressed. I am using Visual Studio 2010 Express.
Here is my code:
switch(uMsg)
{
case WM_INITDIALOG:
{
// do something here
break;
}
case WM_TIMER:
{
if( GetKeyState(VK_F1) & 0x8000 )
if( GetKeyState(VK_F2) & 0x8000 )
{
// do something here
}
break;
}
case WM_CLOSE:
{
// do something here
}
}
return 0;

Answer 1

SOLVED:) well my problem is solved after trying for sometime finally i got it the problem
was that little "break;" statement please look at the code its working flawless.
Thank you so very much for your time and help appreciated
case WM_TIMER:
{
if(GetKeyState(VK_F1) & 0x8000 )
{
MessageBoxA (NULL, TEXT ("This is a call from F1 key!"), TEXT("Test F1 key"), MB_OK );
}
//break; << this was the one that was giving me the problem
if(GetKeyState(VK_F2) & 0x8000 )
{
MessageBoxA (NULL, TEXT ("This is a call from F2 key!"), TEXT("Test F2 key"), MB_OK );
}
//if(GetKeyState(VK_F3) & 0x8000 ) << i can add multi VK_ keys here
break; // << should be here
}
case WM_CLOSE:

Answer 2

A couple points:
Are you sure you want to poll like this? Maybe you want to be responding to notifications when the user presses these keys (WM_KEYDOWN for example) instead of polling periodically? Your code has the problem that it can easily miss if you press & release F1 between WM_TIMERs.
You should probably be using GetKeyState, as Joachim Pileborg says. GetAsyncKeyState works on the state of the keyboard at the time of the call; GetKeyState works on the state of the keyboard when the current message was sent. This tends to keep things more tightly synchronized. That said, if you're polling in WM_TIMER, it probably doesn't matter so much.
You are only checking if the return value is non-zero, which is not how this function works. The return value is a bitmask. From the documentation:
If the high-order bit is 1, the key is down; otherwise, it is up.
If the low-order bit is 1, the key is toggled. A key, such as the CAPS LOCK key, is toggled if it is turned on. The key is off and untoggled if the low-order bit is 0. A toggle key's indicator light (if any) on the keyboard will be on when the key is toggled, and off when the key is untoggled.
Thus, to check for F1:
if( GetKeyState(VK_F1) & 0x8000 )
{
...
}