处理鼠标移动事件

[gerrardgld]

我想实现在鼠标移时输出它的坐标，这段代码错在哪啊？谢谢

case WM_MOUSEMOVE:
HDC hdc1;
hdc1=GetDC(hwnd);
POINT point;

GetCursorPos(&point );// address of structure for cursor position
int x=point.x;
int y=point.y;

TextOutA(...);

[dirdirdir3]

不需要GetCursorPos(),wm_mousemove本身就有坐标....
int x=LOWORD(lParam);
int y=HIWORD(lParam);

什么错了?

[Gujinguo]

case WM_MOUSEMOVE:
{
HDC hdc1 = GetDC(hwnd);
....
CString strText;
strText.Format(_T("Position %d, %d"), x, y);
TextOutA(hdc1, 0, 0, strText, 0);
}

[gerrardgld]

1>c:\documents and settings\杰拉德\my documents\visual studio 2008\projects\myfirst\myfirst\myfirst.cpp(88) : error C2361: “default”标签跳过“y”的初始化操作
1> c:\documents and settings\杰拉德\my documents\visual studio 2008\projects\myfirst\myfirst\myfirst.cpp(81) : 参见“y”的声明
1>c:\documents and settings\杰拉德\my documents\visual studio 2008\projects\myfirst\myfirst\myfirst.cpp(88) : error C2361: “default”标签跳过“x”的初始化操作
1> c:\documents and settings\杰拉德\my documents\visual studio 2008\projects\myfirst\myfirst\myfirst.cpp(80) : 参见“x”的声明

[副组长]

不知道你想做什么,鼠标移到哪儿就在哪儿输出字符串吗？这样光写不删会满页都是字的。

光GetDC 没有 ReleaseDC。

[fish_gao]

注意

switch ( index )
{
case 0:
int x = 0;
int y = 0;
break;
}

和

switch ( index )
{
case 0:
{
int x = 0;
int y = 0;
}
break;
}

之间的差别,还有1楼的方法已经可以的了,不用自己去获取鼠标位置

[副组长]

哦，在switch case语句中间是不许定义变量的，CString strText;或者int x; int y;等都是不可以的。

[wenqinwuhai]

[Quote=引用 1 楼 dirdirdir3 的回复:]
不需要GetCursorPos(),wm_mousemove本身就有坐标....
int x=LOWORD(lParam);
int y=HIWORD(lParam);

什么错了?
[/Quote] 饿

[gerrardgld]

#include<windows.h>
#include<stdio.h>


LRESULT CALLBACK WinSunProc(
HWND hwnd, // handle to window
UINT uMsg, // message identifier
WPARAM wParam, // first message parameter
LPARAM lParam // second message parameter
);

int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,int nShowCmd)
{
WNDCLASS wndcls;
wndcls.cbClsExtra=0;
wndcls.cbWndExtra=0;
wndcls.hbrBackground=(HBRUSH)GetStockObject(BLACK_BRUSH);
wndcls.hCursor=LoadCursor(NULL,IDC_CROSS);
wndcls.hIcon=LoadIcon(NULL,IDI_ERROR);
wndcls.hInstance=hInstance;
wndcls.lpfnWndProc=WinSunProc;
wndcls.lpszClassName="kop";
wndcls.lpszMenuName=NULL;
wndcls.style=CS_HREDRAW|CS_VREDRAW;
RegisterClass(&wndcls);

HWND hwnd;

hwnd=CreateWindowEx(WS_EX_WINDOWEDGE,"kop","kopkop",WS_OVERLAPPEDWINDOW,0,0,600,400,NULL,NULL,hInstance,NULL);
ShowWindow(hwnd,SW_SHOWNORMAL);
UpdateWindow(hwnd);

MSG msg;

while(GetMessage(&msg,hwnd,0,0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return 0;
}
LRESULT CALLBACK WinSunProc(
HWND hwnd, // handle to window
UINT uMsg, // message identifier
WPARAM wParam, // first message parameter
LPARAM lParam // second message parameter
)
{
switch(uMsg)
{
case WM_CHAR:
char szChar[20];
sprintf(szChar,"char is %d",wParam);
MessageBox(hwnd,szChar,"weixin",0);
break;
case WM_LBUTTONDOWN:
MessageBox(hwnd,"mouse clicked","weixin",0);
HDC hdc;
hdc=GetDC(hwnd);
TextOut(hdc,0,50,"计算机编程语言培训",strlen("计算机编程语言培训"));
ReleaseDC(hwnd,hdc);
break;
case WM_PAINT:
HDC hDC;
PAINTSTRUCT ps;
hDC=BeginPaint(hwnd,&ps);
TextOut(hDC,0,0,"维新培训",strlen("维新培训"));
EndPaint(hwnd,&ps);
break;
case WM_CLOSE:
if(IDYES==MessageBox(hwnd,"是否真的结束？","weixin",MB_YESNO))
{
DestroyWindow(hwnd);
}
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
case WM_MOUSEMOVE:


default:
return DefWindowProc(hwnd,uMsg,wParam,lParam);
}
return 0;
}


帮我实现下WM_MOUSEMOVE事件 在窗口0，0位置输出鼠标坐标，谢谢，我超级新手。。。