画矩形

#include “stdafx.h”
#include “EatPeasPproject.h”
#include"GMap.h"

#define MAX_LOADSTRING 100
#define WWIDTH 700 //宽
#define WHEIGHT 740 //高
#define PI 3.1415926

// 全局变量:
HINSTANCE hInst; // 当前实例
HWND g_hwnd; //当前窗体
WCHAR szTitle[MAX_LOADSTRING]; // 标题栏文本
WCHAR szWindowClass[MAX_LOADSTRING]; // 主窗口类名

// 此代码模块中包含的函数的前向声明:
ATOM MyRegisterClass(HINSTANCE hInstance);
BOOL InitInstance(HINSTANCE, int);
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
INT_PTR CALLBACK About(HWND, UINT, WPARAM, LPARAM);

int APIENTRY wWinMain(In HINSTANCE hInstance,
In_opt HINSTANCE hPrevInstance,
In LPWSTR lpCmdLine,
In int nCmdShow)
{
UNREFERENCED_PARAMETER(hPrevInstance);
UNREFERENCED_PARAMETER(lpCmdLine);

// TODO: 在此放置代码。

// 初始化全局字符串
LoadStringW(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
LoadStringW(hInstance, IDC_EATPEASPPROJECT, szWindowClass, MAX_LOADSTRING);
MyRegisterClass(hInstance);

// 执行应用程序初始化: 
if (!InitInstance (hInstance, nCmdShow))
{
    return FALSE;
}

HACCEL hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_EATPEASPPROJECT));

while (1)
{
if (PeekMessage(&msg,nullptr,0,0,PM_REMOVE))
{
if (msg.message == WM_QUIT)
{
break;
}

		TranslateMessage(&msg);
		DispatchMessage(&msg);
}

HDC hdc = GetDC(g_hwnd);
//画矩形
//画矩形框
Rectangle(hdc, 100, 100, 200, 200);

	HBRUSH br = CreateSolidBrush(RGB(0, 0, 225));  //画刷
	MSG msg;		

	//填充矩形
	RECT rect;
	rect.left = 200;
	rect.top = 200;
	rect.right = 300;
	rect.bottom = 400;
	FillRect(hdc, &rect, br); 			 

DeleteObject(br);
ReleaseDC(g_hwnd, hdc);
}
return (int) msg.wParam;
}

//
// 函数: MyRegisterClass()
//
// 目的: 注册窗口类。
//
ATOM MyRegisterClass(HINSTANCE hInstance)
{
WNDCLASSEXW wcex; //结构体

//对结构体的成员赋值
wcex.cbSize = sizeof(WNDCLASSEX);

wcex.style          = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc    = WndProc;					 //控制方法
wcex.cbClsExtra     = 0;
wcex.cbWndExtra     = 0;
wcex.hInstance      = hInstance;
wcex.hIcon          = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_EATPEASPPROJECT));
wcex.hCursor        = LoadCursor(nullptr, IDC_ARROW);
wcex.hbrBackground  = (HBRUSH)(COLOR_WINDOW+1);
wcex.lpszMenuName   = MAKEINTRESOURCEW(IDC_EATPEASPPROJECT);
wcex.lpszClassName  = szWindowClass;
wcex.hIconSm        = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));

return RegisterClassExW(&wcex);

}

//
// 函数: InitInstance(HINSTANCE, int)
//
// 目的: 保存实例句柄并创建主窗口
//
// 注释:
//
// 在此函数中，我们在全局变量中保存实例句柄并
// 创建和显示主程序窗口。
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
hInst = hInstance; // 将实例句柄存储在全局变量中

HWND hWnd = CreateWindowW(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
0, 0, WWIDTH, WHEIGHT, nullptr, nullptr, hInstance, nullptr); //CW_USEDEFAULT, 0(窗体相对于屏幕的坐标位置)

if (!hWnd)
{
return FALSE;
}

g_hwnd = hWnd;

ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);

return TRUE;
}