GetAsyncKeyState / GetKeyState returns <0 values even after releasing the MouseButton

GetAsyncKeyState / GetKeyState returns <0 values even after releasing the MouseButton. This happens only if we are trying to drop a file from my application to Another application window(eg Acrobat), but it returns 0 when i am dragging & dropping one file to an Application shortcut(eg: Acrobat shortcut icon in my desktop). Could you please help me.
Thanks in advance.

This is Windows-specific question.

What do you want to read from GetAsyncKeyState? It returns two states:
Current up/down state and on/off state (like capslock button).

I assume you want to check whether it's up/down:

Code:

---

if (GetAsyncKeyState(VK_xxx) & 0x8000 != 0)
{
}

---

Remember it returns short, not int.

Thanks kmdv.
Sorry for posting in wrong place.
my code is:
if(GetAsyncKeyState(VK_LBUTTON) >= 0 && (GetAsyncKeyState(VK_RBUTTON) >= 0) )
here I am checking both keys are up after dropping the file. This condition is getting passed when i am droping the file to icon & failing when i an dropping the file to the application window.