C++ and GetAsyncKeyState() function

As it gives only Upper case letters, any idea how to get lower ca开发者_高级运维se?? If the user simultaneously pessed SHIFT+K or CAPSLOCK is on,etc, I want to get lower cases.. is it possible in this way or another??

Thanks,

Suppose "c" is the variable you put into GetAsyncKeyState().

You may use the following method to detect whether you should print upper case letter or lower case letter.

string out = "";

bool isCapsLock() { // Check if CapsLock is toggled
    if ((GetKeyState(VK_CAPITAL) & 0x0001) != 0) // If the low-order bit is 1, the key is toggled
        return true;
    else
        return false;
}

bool isShift() {  // Check if shift is pressed
    if ((GetKeyState(VK_SHIFT) & 0x8000) != 0) // If the high-order bit is 1, the key is down; otherwise, it is up.
        return true;
    else
        return false;
}

if (c >= 65 && c <= 90) { // A-Z
    if (!(isShift() ^ isCapsLock())) { // Check if the letter should be lower case
        c += 32;  // in ascii table A=65, a=97. 97-65 = 32
}
out = c;

As you rightly point out, it represents a key and not upper or lower-case. Therefore, perhaps another call to ::GetASyncKeyState(VK_SHIFT) can help you to determine if the shift-key is down and then you will be able to modify the result of your subsequent call appropriately.