下面这个例子是获取屏幕的坐标：
#include<windows.h>
#include<windowsx.h>
LRESULT CALLBACK WindowProc(
HWND hwnd, // handle to window
UINT uMsg, // message identifier
WPARAM wParam, // first message parameter
LPARAM lParam // second message parameter
);
int WINAPI WinMain(
HINSTANCE hInstance, // handle to current instance
HINSTANCE hPrevInstance, // handle to previous instance
LPSTR lpCmdLine, // command line
int nCmdShow // show state
)
{
static TCHAR szAppName[]=TEXT("AppName");
HWND hwnd;
MSG msg;
WNDCLASS wndclass;
wndclass.cbClsExtra=0;
wndclass.cbWndExtra=0;
wndclass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
wndclass.hCursor=LoadCursor(NULL,IDC_ARROW);
wndclass.hIcon=LoadIcon(NULL,IDI_APPLICATION);
wndclass.hInstance=hInstance;
wndclass.lpfnWndProc=WindowProc;
wndclass.lpszClassName=szAppName;
wndclass.lpszMenuName=NULL;
wndclass.style=CS_HREDRAW|CS_VREDRAW;
if(!RegisterClass(&wndclass)){
MessageBox(NULL,TEXT("This program requires Windows NT"),szAppName,MB_ICONERROR);
}
hwnd=CreateWindow(
szAppName, // registered class name
TEXT("This is title"), // window name
WS_OVERLAPPEDWINDOW, // window style
CW_USEDEFAULT, // horizontal position of window
CW_USEDEFAULT, // vertical position of window
CW_USEDEFAULT, // window width
CW_USEDEFAULT, // window height
NULL, // handle to parent or owner window
NULL, // menu handle or child identifier
hInstance, // handle to application instance
NULL // window-creation data
);
ShowWindow(hwnd,nCmdShow);
UpdateWindow(hwnd);
while(GetMessage(&msg,NULL,0,0)){
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
LRESULT CALLBACK WindowProc(
HWND hwnd, // handle to window
UINT uMsg, // message identifier
WPARAM wParam, // first message parameter
LPARAM lParam // second message parameter
)
{
HDC hdc;
PAINTSTRUCT ps;
TCHAR szBuffer[30];
POINT point;
RECT rect;
static RECT rr;
static int cxClient;
static int cyClient;
switch(uMsg){
case WM_SIZE:
cxClient=GET_X_LPARAM(lParam);
cyClient=GET_Y_LPARAM(lParam);
GetClientRect(hwnd,&rr);
//wsprintf(szBuffer,TEXT("cyClient %d"),cyClient);
//MessageBox(NULL,szBuffer,TEXT("tip"),MB_ICONERROR);
return 0;
case WM_PAINT:
hdc=BeginPaint(hwnd,&ps);
GetCursorPos(&point);
TextOut(hdc,200,200,szBuffer,wsprintf(szBuffer,TEXT("the point is %d,%d"),point.x,point.y));
EndPaint(hwnd,&ps);
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
case WM_MOUSEMOVE:
//SendMessage(hwnd,WM_PAINT,0,0);
rect.left=rr.left;
rect.top=rr.top;
rect.right=rr.right;
rect.bottom=rr.bottom;
InvalidateRect(hwnd,&rect,TRUE);
return 0;
}
return DefWindowProc(hwnd,uMsg,wParam,lParam);
}
可以把屏幕坐标转化为客户区坐标：
#include<windows.h>
#include<windowsx.h>
LRESULT CALLBACK WindowProc(
HWND hwnd, // handle to window
UINT uMsg, // message identifier
WPARAM wParam, // first message parameter
LPARAM lParam // second message parameter
);
int WINAPI WinMain(
HINSTANCE hInstance, // handle to current instance
HINSTANCE hPrevInstance, // handle to previous instance
LPSTR lpCmdLine, // command line
int nCmdShow // show state
)
{
static TCHAR szAppName[]=TEXT("AppName");
HWND hwnd;
MSG msg;
WNDCLASS wndclass;
wndclass.cbClsExtra=0;
wndclass.cbWndExtra=0;
wndclass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
wndclass.hCursor=LoadCursor(NULL,IDC_ARROW);
wndclass.hIcon=LoadIcon(NULL,IDI_APPLICATION);
wndclass.hInstance=hInstance;
wndclass.lpfnWndProc=WindowProc;
wndclass.lpszClassName=szAppName;
wndclass.lpszMenuName=NULL;
wndclass.style=CS_HREDRAW|CS_VREDRAW;
if(!RegisterClass(&wndclass)){
MessageBox(NULL,TEXT("This program requires Windows NT"),szAppName,MB_ICONERROR);
}
hwnd=CreateWindow(
szAppName, // registered class name
TEXT("This is title"), // window name
WS_OVERLAPPEDWINDOW, // window style
CW_USEDEFAULT, // horizontal position of window
CW_USEDEFAULT, // vertical position of window
CW_USEDEFAULT, // window width
CW_USEDEFAULT, // window height
NULL, // handle to parent or owner window
NULL, // menu handle or child identifier
hInstance, // handle to application instance
NULL // window-creation data
);
ShowWindow(hwnd,nCmdShow);
UpdateWindow(hwnd);
while(GetMessage(&msg,NULL,0,0)){
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
LRESULT CALLBACK WindowProc(
HWND hwnd, // handle to window
UINT uMsg, // message identifier
WPARAM wParam, // first message parameter
LPARAM lParam // second message parameter
)
{
HDC hdc;
PAINTSTRUCT ps;
TCHAR szBuffer[30];
POINT point;
RECT rect;
static RECT rr;
static int cxClient;
static int cyClient;
switch(uMsg){
case WM_SIZE:
cxClient=GET_X_LPARAM(lParam);
cyClient=GET_Y_LPARAM(lParam);
GetClientRect(hwnd,&rr);
//wsprintf(szBuffer,TEXT("cyClient %d"),cyClient);
//MessageBox(NULL,szBuffer,TEXT("tip"),MB_ICONERROR);
return 0;
case WM_PAINT:
hdc=BeginPaint(hwnd,&ps);
GetCursorPos(&point);
ScreenToClient(hwnd,&point);//将屏幕坐标转化为客户坐标
TextOut(hdc,200,200,szBuffer,wsprintf(szBuffer,TEXT("the point is %d,%d"),point.x,point.y));
EndPaint(hwnd,&ps);
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
case WM_MOUSEMOVE:
//SendMessage(hwnd,WM_PAINT,0,0);
rect.left=rr.left;
rect.top=rr.top;
rect.right=rr.right;
rect.bottom=rr.bottom;
InvalidateRect(hwnd,&rect,TRUE);
return 0;
}
return DefWindowProc(hwnd,uMsg,wParam,lParam);
}