WINAPI your own keyboard onPress and onReleased - c++

Question

Currently, I am creating my own function onPress and onRelease. However, I am having problem with my onRelease function. Apparently, my onRelease kept on triggering even if I have not release my keyboard.
I suspected it has to do with the number of cycle inside the CPU but I wasn't sure of this theory. Somehow, maybe the cycle is slower than my frame, that why the PeerMessage return false? As no event was triggered.
Solution to it:
**Under the WinProc function create a new case called WM_KEYUP. This event will trigger once the user leave the button. It help to solve the number of cycle inside the CPU issued.
**
*Note:
I have update my detail of my code.
Description. Window Programming
I have two std::array that store my keyboard data
1) InputCurr
2) InputPrev
std::array<char, 256> inputPrev;
std::array<char, 256> inputCurr;
While(TRUE) {
std::copy(InputCurr.begin(), InputCurr.end(), InputPrev.begin());
inputCurr.fill(0);
while(PeekMessage (&uMsg, NULL, 0, 0, PM_REMOVE))
{
TranslateMessage (&uMsg);
DispatchMessage (&uMsg);
}
if(onReleased(x030)) //Button 0
//do something
}
char onReleased(char key)
{
return (inputCurr[key] && !inputPrev[key])? 1 : 0;
}
void VEInputMessage(WPARAM key)
{
inputCurr[key]= 1; //Set to true of the keyboard key
}
LRESULT CALLBACK WinProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
HDC dc; /* device context */
PAINTSTRUCT ps; /* the paint struct */
RECT rect;
UNREFERENCED_PARAMETER(rect);
switch (msg)
{
/* when the window is created */
case WM_CREATE:
break;
/* when the rectangle is drawn */
case WM_LBUTTONDOWN:
break;
case WM_MOUSEMOVE:
break;
case WM_PAINT:
dc = BeginPaint(hWnd, &ps);
EndPaint(hWnd, &ps);
break;
/* When it's time for the window to be closed and removed */
case WM_DESTROY:
PostQuitMessage(0);
break;
case WM_KEYDOWN:
VEINPUT::VEInputMessage(wParam); //Updated the input key
if(wParam == AEVK_ESCAPE)
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd, msg, wParam, lParam);
}
return 0;
}