键盘问题

[hhjdk967]

请问我已经知道了一个键盘的虚拟键吗比如wparam,我怎么知道我按下了这个键盘并释放？

[bestbear]

switch (wParam)
{
case WM_KEYDOWN:
case WM_SYSKEYDOWN:
case WM_KEYUP:
case WM_SYSKEYUP:
PKBDLLHOOKSTRUCT p = (PKBDLLHOOKSTRUCT) lParam;
if(p->vkCode == VK_LWIN)
{
}
((p->vkCode == VK_TAB) && ((p->flags & LLKHF_ALTDOWN) != 0)) ||
((p->vkCode == VK_ESCAPE) && ((p->flags & LLKHF_ALTDOWN) != 0)) ||
((p->vkCode == VK_ESCAPE) && ((GetKeyState(VK_CONTROL)&0x8000) != 0))||
( p->vkCode == VK_LWIN) || ( p->vkCode==VK_RWIN )
;
break;

[bestbear]

不好意思，按错了
switch (wParam)
{
case WM_KEYDOWN:
case WM_SYSKEYDOWN:
case WM_KEYUP:
case WM_SYSKEYUP:
PKBDLLHOOKSTRUCT p = (PKBDLLHOOKSTRUCT) lParam;
if(p->vkCode == VK_LWIN)
{
AfxMessageBox("Left windows");
}
break;
}

[hhjdk967]

如果我知道有一个字符‘a’，怎么才能知道按下了'a'键？

[bestbear]

http://www.pconline.com.cn/pcedu/empolder/gj/vc/0312/255936.html