long WINAPI WndProc(HWND hWnd,UINT iMessage,UINT wParam,LONG lParam);
BOOL InitWindowsClass(HINSTANCE hInstance);
BOOL InitWindows(HINSTANCE hInstance,int nCmdShow);
HWND hWndMain;
//消息处理函数
long WINAPI WndProc(HWND hWnd,UINT iMessage,UINT wParam,LONG lParam)
{
HDC hDC;
PAINTSTRUCT ps;
static char cUp[]="You had hitted the UP key";
static BOOL nUpKeyDown=FALSE,nShiftKeyDown=FALSE,nCtrlKeyDown=FALSE,nCtrlAKeyDown=FALSE,
nShiftBKeyDown=FALSE;
switch(iMessage)
{
case WM_KEYDOWN:
{
switch(wParam)
{
case VK_UP:
nUpKeyDown=TRUE;
break;
default:
break;
}
}
case WM_KEYUP:
InvalidateRect(hWnd,NULL,FALSE);
break;
case WM_PAINT:
hDC=BeginPaint(hWnd,&ps);
SetTextColor(hDC,RGB(255,0,0));
if(nUpKeyDown==TRUE)
{
//Rectangle(hDC,0,0,300,200);
TextOut(hDC,0,0,cUp,strlen(cUp));
nUpKeyDown=FALSE;
}
EndPaint(hWnd,&ps);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd,iMessage,wParam,lParam);
}
return 0;
}
//初始化窗口
BOOL InitWindows(HINSTANCE hInstance,int nCmdShow)
{
HWND hWnd;
hWnd=CreateWindow("WinKeyboard",
"键盘操作例程",
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
NULL,
NULL,
hInstance,
NULL);
if(!hWnd)
return FALSE;
hWndMain=hWnd;
ShowWindow(hWnd,nCmdShow);
UpdateWindow(hWnd);
return TRUE;
}
／／／／／／／／／／／／／／／／
long WINAPI WndProc(HWND hWnd,UINT iMessage,UINT wParam,LONG lParam);
BOOL InitWindowsClass(HINSTANCE hInstance);
BOOL InitWindows(HINSTANCE hInstance,int nCmdShow);
HWND hWndMain;
//消息处理函数
long WINAPI WndProc(HWND hWnd,UINT iMessage,UINT wParam,LONG lParam)
{
HDC hDC;
PAINTSTRUCT ps;
static char cUp[]="You had hitted the UP key";
static BOOL nUpKeyDown=FALSE,nShiftKeyDown=FALSE,nCtrlKeyDown=FALSE,nCtrlAKeyDown=FALSE,
nShiftBKeyDown=FALSE;
switch(iMessage)
{
case WM_KEYDOWN:
{
switch(wParam)
{
case VK_UP:
nUpKeyDown=TRUE;
break;
default:
break;
}
}
case WM_KEYUP:
InvalidateRect(hWndMain,NULL,FALSE);
break;
case WM_PAINT:
hDC=BeginPaint(hWndMain,&ps);
SetTextColor(hDC,RGB(255,0,0));
if(nUpKeyDown==TRUE)
{
//Rectangle(hDC,0,0,300,200);
TextOut(hDC,0,0,cUp,strlen(cUp));
nUpKeyDown=FALSE;
}
EndPaint(hWndMain,&ps);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd,iMessage,wParam,lParam);
}
return 0;
}
始化窗口
BOOL InitWindows(HINSTANCE hInstance,int nCmdShow)
{
HWND hWnd;
hWnd=CreateWindow("WinKeyboard",
"键盘操作例程",
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
NULL,
NULL,
hInstance,
NULL);
if(!hWnd)
return FALSE;
hWndMain=hWnd;
ShowWindow(hWnd,nCmdShow);
UpdateWindow(hWnd);
return TRUE;
}
hWndMain是全局变量
为什么我用HWND hWnd义的局部变量，也可以用于全局呢？
在//初始化窗口
BOOL InitWindows(HINSTANCE hInstance,int nCmdShow)
中 hWndMain=hWnd;
为什么在
//消息处理函数
long WINAPI WndProc(HWND hWnd,UINT iMessage,UINT wParam,LONG lParam)
中
case WM_KEYUP:
InvalidateRect(hWnd,NULL,FALSE);
break;
case WM_PAINT:
hDC=BeginPaint(hWnd,&ps);
SetTextColor(hDC,RGB(255,0,0));
if(nUpKeyDown==TRUE)
{
//Rectangle(hDC,0,0,300,200);
TextOut(hDC,0,0,cUp,strlen(cUp));
nUpKeyDown=FALSE;
}
EndPaint(hWnd,&ps);
break;
我很窗口句柄hWnd也是对的呢，而不是只能用全局变量句柄hWndMain?
[此贴子已经被作者于2006-11-9 11:06:56编辑过]
