Кнопки переключателя в диалоговом окне

#include <Windows.h> 
#include <windowsx.h> 
#include <stdlib.h> 
#include <stdio.h> 
#include <time.h> 
#include <cmath> 
#include <tchar.h> 
#include <math.h> 
#include "resource.h" 
 
HINSTANCE hInst; 
HDC hdc; 
HWND hwnd; 
PAINTSTRUCT ps; 
LPCTSTR 
pc_WindowClassName = _T("WindowClassName"), 
pc_wndTitle = _T("Created by Vasilev"); 
 
CHAR X1[16] = "0", Y1[16] = "0", 
X2[16] = "100", Y2[16] = "0", 
X3[16] = "50", Y3[16] = "50"; 
 
int a = 20, // текущая высота 
pr_start = 0, code_exit; 
//Прототипы функций для Главного окна 
BOOL RegisterWndClasses(void); 
void UnregisterWndClasses(void); 
BOOL CreateWindows(void); 
LRESULT CALLBACK MainWindowProc(HWND, UINT, WPARAM, LPARAM); 
BOOL MainOnCreate(HWND, LPCREATESTRUCT); 
BOOL MainOnCommand(HWND, int, HWND, UINT); 
BOOL MainOnPaint(HWND); 
BOOL MainOnDestroy(HWND); 
BOOL InitializeApp(void); 
void UninitializeApp(void); 
int APIENTRY WinMain(HINSTANCE, HINSTANCE, LPSTR, int); 
//Прототипы функций для Модального диалогового окна 
BOOL CALLBACK DlgProc(HWND, UINT, WPARAM, LPARAM); 
BOOL DlgOnCommand(HWND, int, HWND, UINT); 
 
BOOL RegisterWndClasses() 
{ 
WNDCLASSEX wce_main; 
memset(&wce_main, 0, sizeof(WNDCLASSEX)); 
wce_main.cbSize = sizeof(WNDCLASSEX); 
wce_main.hInstance = hInst; 
wce_main.style = CS_VREDRAW | CS_HREDRAW; 
wce_main.lpfnWndProc = (WNDPROC)MainWindowProc; 
wce_main.hCursor = LoadCursor(NULL, IDC_ARROW); 
wce_main.hIcon = LoadIcon(hInst, MAKEINTRESOURCE(IDI_ICON1)); 
wce_main.lpszMenuName = MAKEINTRESOURCE(IDR_MENU1); 
wce_main.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH); 
wce_main.lpszClassName = pc_WindowClassName; 
return RegisterClassEx(&wce_main); 
} 
 
void UnregisterWndClasses() 
{ 
UnregisterClass(pc_WindowClassName, hInst); 
} 
 
BOOL CreateWindows() 
{ 
int scrw2 = GetSystemMetrics(SM_CXSCREEN) / 2, 
scrh2 = GetSystemMetrics(SM_CYSCREEN) / 2; 
 
hwnd = CreateWindow(pc_WindowClassName, pc_wndTitle, WS_OVERLAPPED | WS_SYSMENU | WS_MINIMIZEBOX | WS_MAXIMIZEBOX | WS_THICKFRAME | WS_CLIPCHILDREN, 
scrw2 - 400, scrh2 - 300, 800, 600, NULL, NULL, hInst, 0); 
if (!hwnd) 
return FALSE; 
return TRUE; 
} 
 
LRESULT CALLBACK MainWindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) 
{ 
switch (msg) 
{ 
case WM_CREATE: 
return MainOnCreate(hwnd, (LPCREATESTRUCT)lParam); 
 
break; 
 
case WM_COMMAND: 
return MainOnCommand(hwnd, LOWORD(wParam), HWND(lParam), HIWORD(wParam)); 
break; 
 
case WM_PAINT: 
 
return MainOnPaint(hwnd); 
break; 
 
case WM_DESTROY: 
return MainOnDestroy(hwnd); 
 
default: 
return DefWindowProc(hwnd, msg, wParam, lParam); 
} 
return 0L; 
} 
 
BOOL MainOnCreate(HWND hwnd, LPCREATESTRUCT p_cs) 
{ 
hInst = GetModuleHandle(NULL); 
return TRUE; 
} 
 
BOOL MainOnCommand(HWND hwnd, int cmdId, HWND hwndCtrlItem, UINT ntfCode) 
{ 
 
HMENU hm; 
hm = GetMenu(hwnd); 
 
switch (cmdId) 
{ 
case ID_DIABOX: 
{ 
DialogBoxParam(hInst, MAKEINTRESOURCE(IDD_DIALOG1), hwnd, DlgProc,0); 
 
InvalidateRect(hwnd, 0, TRUE); 
} 
break; 
 
} 
 
return FALSE; 
} 
 
BOOL MainOnPaint(HWND hwnd) 
{ 
PAINTSTRUCT ps; 
hdc = BeginPaint(hwnd, &ps); 
HPEN hpen_black; 
// HBRUSH hbrush_black; 
hpen_black = CreatePen(PS_SOLID | PS_GEOMETRIC, 3, RGB(0, 0, 0)); 
// hbrush_black = CreateSolidBrush(RGB(0, 0, 0)); 
SelectObject(hdc, hpen_black); 
 
int x_ins = 400, y_ins = 300, x_in = 405, y_in = 305; 
float x1 = atof(X1), x2 = atof(X2), x3 = atof(X3), 
y1 = atof(Y1), y2 = atof(Y2), y3 = atof(Y3); 
MoveToEx(hdc, 200, 300, NULL); 
LineTo(hdc,700,300); 
//стрелки X 
MoveToEx(hdc, 700, 300, NULL); 
LineTo(hdc, 690, 295); 
LineTo(hdc, 690, 305); 
LineTo(hdc, 700, 300); 
 
MoveToEx(hdc, 400, 150, NULL); 
LineTo(hdc, 400, 450); 
//стрелки Y 
MoveToEx(hdc, 400, 150, NULL); 
LineTo(hdc, 395, 160); 
LineTo(hdc, 405, 160); 
LineTo(hdc, 400, 150); 
TextOut(hdc, 410, 150, "Y", 2); 
TextOut(hdc, 710, 300, "X", 2); 
 
if (pr_start == 1) 
{ 
MoveToEx(hdc, x_ins + x1, y_ins - y1, NULL); 
LineTo(hdc, x_ins + x2, y_ins - y2); 
LineTo(hdc, x_ins + x3, y_ins - y3); 
LineTo(hdc,
x_ins + x1, y_ins - y1); 
} 
//Высота текста 
LOGFONT font; 
font.lfHeight = a; 
font.lfEscapement = 0; 
font.lfStrikeOut = 0; 
font.lfUnderline = 0; 
font.lfItalic = 1; 
HFONT hfont; 
hfont = ::CreateFontIndirect(&font); 
char str[] = "1", str2[] = "2", str3[] = "3"; 
SelectObject(ps.hdc, hfont); 
TextOut(hdc, x_in + x1, y_in - y1, str, 1); 
TextOut(hdc, x_in + x2, y_in - y2, str2, 1); 
TextOut(hdc, x_in + x3, y_in - y3, str3, 1); 
 
EndPaint(hwnd, &ps); 
return TRUE; 
} 
 
 
BOOL CALLBACK DlgProc(HWND hdlg, UINT uMsg, WPARAM wParam, LPARAM lParam) 
{ 
switch (uMsg) 
{ 
case WM_INITDIALOG: 
{ 
HICON hIcon1 = LoadIcon(GetModuleHandle(NULL), MAKEINTRESOURCE(IDI_ICON1)); 
SendMessage(hdlg, WM_SETICON, 1, (LPARAM)hIcon1); 
SetDlgItemInt(hdlg, IDC_TEXT, a, FALSE); 
 
//Сохранение предыдущих введеных данных 
SetDlgItemText(hdlg, IDC_PT1X, X1); 
SetDlgItemText(hdlg, IDC_PT1Y, Y1); 
SetDlgItemText(hdlg, IDC_PT2X, X2); 
SetDlgItemText(hdlg, IDC_PT2Y, Y2); 
SetDlgItemText(hdlg, IDC_PT3X, X3); 
SetDlgItemText(hdlg, IDC_PT3Y, Y3); 
 
 
 
return TRUE; 
 
} 
break; 
case WM_COMMAND: 
{ 
switch (LOWORD(wParam)) 
{ 
case IDC_PAINT: 
{ 
if (pr_start == 0) 
{ 
pr_start = 1; 
} 
//Ввод данных через клавиатуру 
GetDlgItemText(hdlg, IDC_PT1X, X1, 16); 
GetDlgItemText(hdlg, IDC_PT1Y, Y1, 16); 
GetDlgItemText(hdlg, IDC_PT2X, X2, 16); 
GetDlgItemText(hdlg, IDC_PT2Y, Y2, 16); 
GetDlgItemText(hdlg, IDC_PT3X, X3, 16); 
GetDlgItemText(hdlg, IDC_PT3Y, Y3, 16); 
 
EndDialog(hdlg, 0); 
 
return TRUE; 
 
} 
break; 
 
case IDC_TEXT: 
GetDlgItemInt(hdlg, IDC_TEXT, &code_exit, FALSE); 
return InvalidateRect(hdlg, NULL, TRUE); 
break; 
 
case WM_COMMAND: 
return DlgOnCommand(hdlg, LOWORD(wParam), HWND(lParam), HIWORD(wParam)); 
break; 
 
case IDC_EXIT: 
 
EndDialog(hdlg, 0); 
return TRUE; 
} 
return InvalidateRect(hdlg, NULL, TRUE); 
} 
break; 
case WM_CLOSE: 
EndDialog(hdlg, 0); 
return TRUE; 
} 
return FALSE; 
} 
 
 
/*********************************************************************************/ 
/* DlgOnCommand */ 
/* ============ */ 
/* обработчик WM_COMMAND - команд (или изменения состояния) элементов управления */ 
/* cmdId командный идентификатор */ 
/* hwndCtrlItem дескриптор окна диалогового элемента */ 
/* ntfCode код нотификации (дополнительные данные о происшедшем событии) */ 
/*********************************************************************************/ 
BOOL DlgOnCommand(HWND hdlg, int cmdId, HWND hwndCtrlItem, UINT ntfCode) 
{ 
int code_exit, w; 
 
switch (cmdId) 
{ 
case IDC_BIG: 
w = GetDlgItemInt(hdlg, IDC_TEXT, &code_exit, FALSE); 
 
if (code_exit == 0) 
w = a + 1; 
else 
w++; 
 
SetDlgItemInt(hdlg, IDC_TEXT, w, FALSE); 
 
a = w; 
 
break; 
 
// клавиша '«' 
case IDC_MAL: 
w = GetDlgItemInt(hdlg, IDC_TEXT, &code_exit, FALSE); 
 
if (code_exit == 0 || w<2) 
w = 1; 
else 
w--; 
 
SetDlgItemInt(hdlg, IDC_TEXT, w, FALSE); 
 
a = w; 
 
break; 
 
DestroyWindow(hdlg); 
 
default: 
return FALSE; 
} 
return FALSE; 
} //func DlgOnCommand 
 
 
BOOL InitializeApp() 
{ 
 
if (!RegisterWndClasses()) { 
MessageBox(NULL, "Ошибка регистрации классов окон.", pc_wndTitle, MB_OK); 
return FALSE; 
} 
CreateWindows(); 
ShowWindow(hwnd, SW_SHOW); 
UpdateWindow(hwnd); 
return TRUE; 
} 
 
BOOL MainOnDestroy(HWND hwnd) 
{ 
PostQuitMessage(0); 
return TRUE; 
} 
 
void UninitializeApp() 
{ 
UnregisterWndClasses(); 
} 
 
int APIENTRY WinMain(HINSTANCE hi_crr, HINSTANCE hi_prv, LPSTR pc_cmdLine, int cmdShow) 
{ 
MSG msg; 
hInst = hi_crr; 
InitializeApp(); 
while (GetMessage(&msg, NULL, 0, 0)) 
{ 
TranslateMessage(&msg); 
DispatchMessage(&msg); 
} 
UninitializeApp(); 
return msg.wParam; 
}