Win32 API 简单编程代码

#include<windows.h> #include<stdio.h> #include<stdlib.h> #include"resource.h" LRESULT CALLBACK WndProc(HWND hwnd,UINT message ,WPARAM wParam,LPARAM lParam); int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) { // TODO: Place code here. char lpszClassName[]="窗口"; char lpszTitle[]="简单的Windows API 编程"; WNDCLASS wndclass; wndclass.style=0; wndclass.lpfnWndProc=WndProc; wndclass.cbClsExtra=0; wndclass.cbWndExtra=0; wndclass.hInstance=hInstance; wndclass.hIcon=(HICON)::LoadImage(hInstance,MAKEINTRESOURCE(IDI_ICON), IMAGE_ICON,64,64,LR_DEFAULTCOLOR); wndclass.hCursor=LoadCursor(NULL,IDC_ARROW); wndclass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH); wndclass.lpszMenuName=(LPCTSTR)IDM_MENU; wndclass.lpszClassName=lpszClassName; RegisterClass(&wndclass); //if(!RegisterClass(&wndclass)); //{ MessageBeep(0); // return FALSE; //}; HWND hwnd; hwnd=CreateWindow(lpszClassName,lpszTitle,WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,CW_USEDEFAULT, 350,350, NULL,NULL,hInstance,NULL); ShowWindow(hwnd,SW_SHOWNORMAL); UpdateWindow(hwnd); MSG msg; while(GetMessage(&msg,NULL,0,0)) { TranslateMessage(&msg); DispatchMessage(&msg); } return msg.wParam; } LRESULT CALLBACK WndProc(HWND hwnd,UINT message ,WPARAM wParam,LPARAM lParam) { char messageleft[]=" the rights button have been pushed"; static BOOL f=false; static BOOL l=false; static BOOL r=false; static BOOL e=false; static BOOL s=false; switch(message) { case WM_COMMAND: switch (wParam) { case ID_GRAPH_POINT: HDC h; h=GetDC(hwnd); //HPEN hnewpen,holdpen; //hnewpen=CreatePen(PS_DASHDOT,1,RGB(255,0,0)); //holdpen=(HPEN)SelectObject(h,hnewpen); SetPixel (h, 70, 45, RGB(255,0,0)) ; TextOut(h,30,30,"画点",strlen("画点")); //SelectObject(h,holdpen); //DeleteObject(hnewpen); ReleaseDC(hwnd,h); f=true; break; case ID_GRAPH_LINE: HDC g; g=GetDC(hwnd); //hnewpen=CreatePen(PS_DASHDOT,1,RGB(255,255,0)); //holdpen=(HPEN)SelectObject(g,hnewpen); TextOut(g,30,50,"画线",strlen("画线")); MoveToEx (g, 60, 60, NULL) ; LineTo (g, 150, 60) ; //SelectObject(g,holdpen); //DeleteObject(hnewpen); ReleaseDC(hwnd,g); l=true; break; case ID_GRAPH_RECT: HDC m; m=GetDC(hwnd); TextOut(m,30,90,"矩形",strlen("矩形")); Rectangle(m,70,100,150,150) ; ReleaseDC(hwnd,m); r=true; break; case ID_GRAPH_ELLIPSE: HDC n; n=GetDC(hwnd); TextOut(n,30,150,"椭圆",strlen("椭圆")); Ellipse(n,70,160,200,250) ; ReleaseDC(hwnd,n); e=true; break; case IDD_HELP: MessageBox(GetFocus(),"简单的Windows API 编程","help",MB_OK|MB_ICONQUESTION); break; case ID_ABOUTME: MessageBox(GetFocus(),"初次WinApi编程,水平有限","关于我",MB_OK|MB_ICONINFORMATION); break; default: return DefWindowProc(hwnd, message, wParam, lParam); } break; case WM_LBUTTONDOWN: s=true; HDC hdc; hdc=GetDC(hwnd); TextOut(hdc,150,20,"Hello World",strlen("Hello World")); ReleaseDC(hwnd,hdc); break; case WM_PAINT: HDC hDC; PAINTSTRUCT ps; hDC=(HDC)BeginPaint(hwnd,&ps); if(f) { SetPixel (hDC, 70, 45, RGB(255,0,0)) ; TextOut(hDC,30,30,"画点",strlen("画点")); } if(l) { TextOut(hDC,30,50,"画线",strlen("画线")); MoveToEx (hDC, 60, 60, NULL) ; LineTo (hDC, 150, 60) ; } if(r) { TextOut(hDC,30,90,"矩形",strlen("矩形")); Rectangle(hDC,70,100,150,150) ; } if(e) { TextOut(hDC,30,150,"椭圆",strlen("椭圆")); Ellipse(hDC,70,160,200,250) ; } if(s) { TextOut(hDC,150,20,"Hello World",strlen("Hello World")); } EndPaint(hwnd,&ps); break; case WM_RBUTTONDOWN: MessageBox(GetFocus(),messageleft,"hello",MB_OK|MB_ICONINFORMATION); break; case WM_DESTROY: PostQuitMessage(0); default: return DefWindowProc(hwnd,message,wParam,lParam); } return 0; }