Visual Studioが習慣ここで以下のコードはです "のMoveTo"（のWin32API）

Question

で動作する、VSは 線109（のMoveTo（HDC、X、Y）上ことと、
"のMoveTo" は未定義ある

。

は、誰かが間違っているものを私に説明できますか？ これは、Win32APIのアプリケーションです。

// Win32Project.cpp : Defines the entry point for the application. 
// 

#include "stdafx.h" 
#include "Win32Project4.h" 
#include <windows.h> 
#include <stdio.h> 
#include <string.h> 
#include <math.h> 
#include <stdlib.h> 

LRESULT CALLBACK ChildWndProc(HWND, UINT, WPARAM, LPARAM); 
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM); 
int pNum = 0; 
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow) 
{ 
    const WCHAR szAppName[] = L"Third_LAB"; 
    const WCHAR szChildClass[] = L"Child"; 

    HWND hwnd; 
    MSG msg; 
    WNDCLASSEX wndclass; 
    wndclass.cbSize = sizeof(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_CROSS); 
    wndclass.hbrBackground = (HBRUSH)(NULL_BRUSH); 
    wndclass.lpszMenuName = NULL; 
    wndclass.lpszClassName = szAppName; 
    wndclass.hIconSm = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_SMALL)); 
    RegisterClassEx(&wndclass); 
    wndclass.lpfnWndProc = ChildWndProc; 
    wndclass.cbWndExtra = sizeof(WORD); 
    wndclass.hIcon = NULL; 
    wndclass.lpszClassName = szChildClass; 
    wndclass.hIconSm = NULL; 
    RegisterClassEx(&wndclass); 
    hwnd = CreateWindowEx(
     0, 
     szAppName, // window class name 
     L"Third_LAB", // window caption 
     WS_OVERLAPPEDWINDOW | WS_VSCROLL | WS_HSCROLL, // window style 
     200, // initial x position 
     150, // initial y position 
     800, // initial x size 
     500, // initial y size 
     NULL, // parent window handle 
     NULL, // window menu handle 
     hInstance, // program instance handle 
     NULL 
    ); // creation parameters 
    ShowWindow(hwnd, iCmdShow); 
    UpdateWindow(hwnd); 

    while (GetMessage(&msg, 0, 0, 0)) 
     DispatchMessage(&msg); 


    return msg.wParam; 
} 

LRESULT CALLBACK WndProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam) 
{ 
    { 
     const WCHAR szChildClass[] = L"Child"; 
     static int cxBlock, cyBlock; 
     static HDC hdc; 
     static HPEN hPen; 
     static BOOL track = FALSE; 
     static HWND hwndCH; 
     static int x, y; 

     switch (iMsg) { 
     case WM_CREATE: 
      hdc = GetDC(hwnd); 

      hwndCH = CreateWindow(szChildClass, NULL, 
       WS_CHILDWINDOW | WS_VISIBLE, 
       0, 0, cxBlock/2 + 3, cyBlock + 3, 
       hwnd, NULL, 
       (HINSTANCE)GetWindowLong(hwnd, GWL_HINSTANCE), 
       NULL); 
      MoveWindow(hwndCH, 0, 0, cxBlock/2 + 3, cyBlock + 3, NULL); 
      return 0; 

     case WM_SIZE: 

      cxBlock = LOWORD(lParam); 
      cyBlock = HIWORD(lParam); 
      MoveWindow(hwndCH, 0, 0, cxBlock/2 + 3, cyBlock + 3, NULL); 
      return 0; 

     case WM_KEYDOWN: 
      switch (wParam) 
      { 
      case (0x51): 
       PostQuitMessage(0); 
       break; 
      } 
      return 0; 
     case WM_LBUTTONDOWN: 
      track = TRUE; 
      x = LOWORD(lParam); 
      y = HIWORD(lParam); 
      MoveTo(hdc, x, y); 
      switch (pNum) 
      { 
      case (1): 
       hPen = CreatePen(PS_SOLID, 5, 0); 
       SelectObject(hdc, hPen); break; 
      case (2): 
       hPen = CreatePen(PS_SOLID, 15, 0); 
       SelectObject(hdc, hPen); break; 
      case (3): 
       hPen = CreatePen(PS_SOLID, 25, 0); 
       SelectObject(hdc, hPen); break; 
      } 
      return 0; 
     case WM_LBUTTONUP: 
      track = FALSE; 
      DeleteObject(hPen); 
      return 0; 
     case WM_MOUSEMOVE: 
      if (track) 
      { 
       x = LOWORD(lParam); 
       y = HIWORD(lParam); 
       LineTo(hdc, x, y); 
       MoveTo(hdc, x, y); 
      } 
      return 0; 
     case WM_DESTROY: 
      ReleaseDC(hwnd, hdc); 

      PostQuitMessage(0); 
      return 0; 
     } 
     return DefWindowProc(hwnd, iMsg, wParam, lParam); 
    } 
} 
LRESULT CALLBACK ChildWndProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam) 
{ 
    static HDC hdc; 
    PAINTSTRUCT ps; 
    static int cxBlock, cyBlock; 
    static int x, y; 
    static HPEN hPen; 
    switch (iMsg) 
    { 

    case WM_SIZE: 
     hdc = GetDC(hwnd); 
     cxBlock = LOWORD(lParam); 
     cyBlock = HIWORD(lParam); 
     InvalidateRect(hwnd, NULL, TRUE); 
     ReleaseDC(hwnd, hdc); 
     return 0; 

    case WM_PAINT: 
     hdc = BeginPaint(hwnd, &ps); 
     SetROP2(hdc, R2_BLACK); 
     Rectangle(hdc, 0, cyBlock/2 - 100, cxBlock, cyBlock/2 - 105); 
     Rectangle(hdc, 0, cyBlock/2, cxBlock, cyBlock/2 - 15); 
     Rectangle(hdc, 0, cyBlock/2 + 100, cxBlock, cyBlock/2 + 125); 
     InvalidateRect(hwnd, NULL, FALSE); 
     break; 
    case WM_RBUTTONDOWN: 
     x = LOWORD(lParam); 
     y = HIWORD(lParam); 

     if ((y <= (cyBlock/2 - 100)) && (y >= (cyBlock/2 - 105))) 
      pNum = 1; 
     else if ((y <= (cyBlock/2)) && (y >= (cyBlock/2 - 15))) 
      pNum = 2; 
     else if ((y >= (cyBlock/2 + 100)) && (y <= (cyBlock/2 + 125))) 
      pNum = 3; 
     return 0; 
    case WM_DESTROY: 
     DeleteObject(hPen); 
     ReleaseDC(hwnd, hdc); 
     DestroyWindow(hwnd); 
     return 0; 
    } 
    return DefWindowProc(hwnd, iMsg, wParam, lParam); 

を、私は非常に喜んでいるだろう高速応答を待っています。

Answer 1

MoveTo()は、サポートされなくなったWindows 3.xの機能です。代わりにMoveToEx()を使用し、最後の引数をNULLに設定してください。あなた例えば、それを行うために、独自のMoveTo()を定義することができます。

#define MoveTo(hdc, x, y) ((void)MoveToEx(hdc, x, y, NULL)) 

または：

inline void MoveTo(HDC hdc, int X, int Y) { MoveToEx(hdc, X, Y, NULL); }