（复习）windows sdk 画一个四边形、设置虚线边框、背景模式、以及填充

#include <windows.h>
/*********************
Rectangle
画一个四边形，设置背景，设置边框为虚线，设置虚线间隙背景
邱于涵
2016年12月9日23:33:42
****************/
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow)
{
static TCHAR szAppName[] = TEXT("MyWindows");
HWND hwnd;
MSG msg;
WNDCLASS wndclass;

wndclass.style = CS_HREDRAW | CS_VREDRAW;
wndclass.lpfnWndProc = WndProc;
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = 0;
wndclass.hInstance = hInstance;
wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
wndclass.lpszMenuName = NULL;
wndclass.lpszClassName = szAppName;

if (!RegisterClass(&wndclass))
{
MessageBox(NULL, TEXT("这个程序需要在 Windows NT 才能执行！"), szAppName, MB_ICONERROR);
return 0;
}

hwnd = CreateWindow(szAppName,
TEXT("涵涵工作室"),
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
NULL,
NULL,
hInstance,
NULL);

ShowWindow(hwnd, iCmdShow);
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;
RECT rect;
POINT apt1[4] = { 100, 100, 200, 100, 200, 200, 100, 200 };
//设置五个 手动连回去
POINT apt2[5] = { 300, 100, 400, 100, 400, 200, 300, 200, 300, 100 };
HBRUSH cBrush, pBrush;
HPEN cPen, pPen;
switch (message)
{
case WM_PAINT:
hdc = BeginPaint(hwnd, &ps);
cBrush = CreateSolidBrush(RGB(0, 255, 0));//创建画刷
pBrush = SelectObject(hdc, cBrush); //选择
cPen = CreatePen(PS_DASH, 0, RGB(0, 0, 255));//设置绿色虚线
SetBkMode(hdc, OPAQUE);//设置背景模式为不透明模式
SetBkColor(hdc, RGB(255, 0, 0)); //设置背景（虚线间隙背景）为红色
pPen = SelectObject(hdc,cPen);
Rectangle(hdc, 100, 100, 400, 400);
SelectObject(hdc, pBrush);//选回去（养成好习惯）
DeleteObject(cBrush); //删除
SelectObject(hdc, pPen);
DeleteObject(cPen);
EndPaint(hwnd, &ps);
return 0;

case WM_DESTROY:
PostQuitMessage(0);
return 0;
}

return DefWindowProc(hwnd, message, wParam, lParam);
}