Re: WM_NCLBUTTONDOWN with key-flags?

"David Ching" <>
Wed, 28 Jan 2009 13:51:20 -0800
".rhavin grobert" <> wrote in message

(assume your favorite greeting here;-)

i need to have the flags of WM_LBUTTONDOWN in a WM_NCLBUTTONDOWN
handler. Is there a better way to do this than using GetAsyncKeyState
() a couple of times?

TIA, ~.rhavin;)

i there a better way than doing this...

UINT Q_AsyncKeyState()
UINT nState = 0;
if (GetAsyncKeyState(VK_SHIFT) < 0)
nState |= MK_SHIFT;
if (GetAsyncKeyState(VK_CONTROL) < 0)
nState |= MK_CONTROL;
if (GetAsyncKeyState(VK_LBUTTON) < 0)
nState |= MK_LBUTTON;
if (GetAsyncKeyState(VK_RBUTTON) < 0)
nState |= MK_RBUTTON;
if (GetAsyncKeyState(VK_MBUTTON) < 0)
nState |= MK_MBUTTON;
return nState;

I don't think there is a better way, but you may want to call GetKeyState()
instead of GetAsyncKeyState() so that the state you get back is what it was
when the last message was generated and not when you call the
GetAsyncKeyState(). There is a slight error in your code that it calls
GetAsyncKeyState() multiple times, and just before any of the calls the user
may press a key; what you want is to check the same state for each possible

-- David

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