我想画线段啊

[zhenzhizhe]

#include <windows.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
int nMode;
LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);
LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam);

int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInst,LPSTR lpszCmdLine,int nCmdShow)
{
HWND hwnd;
MSG Msg;
WNDCLASS wndclass;
char lpszClassName[]="映射模式";
char lpszTitle[]="P103";
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=WndProc;
wndclass.lpszClassName=lpszClassName;
wndclass.lpszMenuName=NULL;
wndclass.style=0;

if(!RegisterClass(&wndclass))
{
MessageBeep(0);
return FALSE;
}

hwnd =CreateWindow
(
lpszClassName,
lpszTitle,
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
NULL,
NULL,
hInstance,
NULL
);

ShowWindow(hwnd,nCmdShow);
UpdateWindow(hwnd);

while(GetMessage(&Msg,NULL,0,0))
{
TranslateMessage(&Msg);
DispatchMessage(&Msg);
}
return Msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam)
{
HDC hdc;
PAINTSTRUCT ps;
HBRUSH hB1,hB2,hB3,hB4,hB5;
HPEN hP;
switch(message)
{
case WM_PAINT:
hdc=BeginPaint(hwnd,&ps);
SetMapMode(hdc,nMode);
hP = CreatePen(PS_DASHDOT,6,RGB(50,125,40));
SelectObject(hdc,hP);
MoveToEx(hdc,0,10,NULL);
LineTo(hdc,700,600);

hB1=(HBRUSH)GetStockObject(WHITE_BRUSH);
SelectObject(hdc,hB1);
Rectangle(hdc,0,0,360,900);

hB2=(HBRUSH)GetStockObject(BLACK_BRUSH);
SelectObject(hdc,hB2);
Rectangle(hdc,360,0,720,900);

hB3=(HBRUSH)GetStockObject(GRAY_BRUSH);
SelectObject(hdc,hB3);
Rectangle(hdc,720,0,1080,900);

hB4=(HBRUSH)GetStockObject(BLACK_BRUSH);
SelectObject(hdc,hB4);
Rectangle(hdc,1080,0,1440,900);

hB5=(HBRUSH)GetStockObject(BLACK_BRUSH);
SelectObject(hdc,hB5);
Pie(hdc,0,0,300,200,50,50,300,50);

EndPaint(hwnd,&ps);
return 0;

break;
case WM_DESTROY:
DeleteObject(hB1);
DeleteObject(hB2);
DeleteObject(hB3);
DeleteObject(hB4);
DeleteObject(hB5);
DeleteObject(hP);

PostQuitMessage(0);
break;
default:
return DefWindowProc(hwnd,message,wParam,lParam);
}
return 0;

}

[zhenzhizhe]

编译的结果竟然是框线，真的很奇怪
哪位高手帮帮忙
不胜感激

[yuhudie203]

Rectangle 是用来画框线的啊

[lizhichao1987]

这个程序难度有点大，我们初学者不好看懂。

[kier2]

画线段用BOOL LineTo(
HDC hdc, // device context handle
int nXEnd, // x-coordinate of ending point
int nYEnd // y-coordinate of ending point
);

[yayafu]

用LineTo,画线你画矩形做什么啊,Rectangle本来就不是画线段的,不奇怪

[lodemenwwwww]

来晚了，问题被答完了
用MoveTo和LineTo画线
MoveTo是用来移动到开始位置的
LineTo是用来把线画出来，画到终点位置。
连续画线的话有一个MoveTo就行了
没有MoveTo的话会默认（0，0）为起点

[rover___]

Rectangle
MoveTo
LineTo
函数意义问题

[e01620230]

。。。。。
这个问题 教科书上很多例子 找本抄下就可以了