스크롤바 예제(폰트키우기, RGB값 제목표시줄에 출력

#include <windows.h>

LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);
HINSTANCE g_hInst;
HWND hWndMain;
LPCTSTR lpszClass=TEXT("MyScrollBar");

int APIENTRY WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance
   ,LPSTR lpszCmdParam,int nCmdShow)
{
 HWND hWnd;
 MSG Message;
 WNDCLASS WndClass;
 g_hInst=hInstance;
 
 WndClass.cbClsExtra=0;
 WndClass.cbWndExtra=0;
 WndClass.hbrBackground=(HBRUSH)(COLOR_WINDOW+1);
 WndClass.hCursor=LoadCursor(NULL,IDC_ARROW);
 WndClass.hIcon=LoadIcon(NULL,IDI_APPLICATION);
 WndClass.hInstance=hInstance;
 WndClass.lpfnWndProc=WndProc;
 WndClass.lpszClassName=lpszClass;
 WndClass.lpszMenuName=NULL;
 WndClass.style=CS_HREDRAW | CS_VREDRAW;
 RegisterClass(&WndClass);

 hWnd=CreateWindow(lpszClass,lpszClass,WS_OVERLAPPEDWINDOW,
  CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,
  NULL,(HMENU)NULL,hInstance,NULL);
 ShowWindow(hWnd,nCmdShow);
 
 while (GetMessage(&Message,NULL,0,0)) {
  TranslateMessage(&Message);
  DispatchMessage(&Message);
 }
 return (int)Message.wParam;
}

#define ID_SCRRED 100
#define ID_SCRGREEN 101
#define ID_SCRBLUE 102
#define ID_SCRTEXT 103
HWND hRed,hGreen,hBlue,hText;
int Red,Green,Blue,FontSize;
LRESULT CALLBACK WndProc(HWND hWnd,UINT iMessage,WPARAM wParam,LPARAM lParam)
{
 HDC hdc;
 PAINTSTRUCT ps;
 HFONT hFont, OldFont;
 HBRUSH MyBrush, OldBrush;
 int TempPos;
 static TCHAR str[128];
 TCHAR *string=TEXT("조선대학교");
 switch (iMessage) {
 case WM_CREATE:
  hRed=CreateWindow(TEXT("scrollbar"),NULL,WS_CHILD | WS_VISIBLE | SBS_HORZ,
   10,10,400,20,hWnd,(HMENU)ID_SCRRED,g_hInst,NULL);
  hGreen=CreateWindow(TEXT("scrollbar"),NULL,WS_CHILD | WS_VISIBLE | SBS_HORZ,
   10,40,400,20,hWnd,(HMENU)ID_SCRGREEN,g_hInst,NULL);
  hBlue=CreateWindow(TEXT("scrollbar"),NULL,WS_CHILD | WS_VISIBLE | SBS_HORZ,
   10,70,400,20,hWnd,(HMENU)ID_SCRBLUE,g_hInst,NULL);
  hText=CreateWindow(TEXT("scrollbar"),NULL,WS_CHILD | WS_VISIBLE | SBS_HORZ,
   10,350,400,20,hWnd,(HMENU)ID_SCRTEXT,g_hInst,NULL);
  SetScrollRange(hRed,SB_CTL,0,255,TRUE);
  SetScrollPos(hRed,SB_CTL,0,TRUE);
  SetScrollRange(hGreen,SB_CTL,0,255,TRUE);
  SetScrollPos(hGreen,SB_CTL,0,TRUE);
  SetScrollRange(hBlue,SB_CTL,0,255,TRUE);
  SetScrollPos(hBlue,SB_CTL,0,TRUE);
  SetScrollRange(hText,SB_CTL,0,255,TRUE);
  SetScrollPos(hText,SB_CTL,0,TRUE);
  return 0;
 case WM_HSCROLL:
  if ((HWND)lParam == hRed) TempPos = Red;
  if ((HWND)lParam == hGreen) TempPos = Green;
  if ((HWND)lParam == hBlue) TempPos = Blue;
  if ((HWND)lParam == hText) TempPos = FontSize;
  switch (LOWORD(wParam)) {
  case SB_LINELEFT:
   TempPos=max(0,TempPos-1);
   break;
  case SB_LINERIGHT:
   TempPos=min(255,TempPos+1);
   break;
  case SB_PAGELEFT:
   TempPos=max(0,TempPos-10);
   break;
  case SB_PAGERIGHT:
   TempPos=min(255,TempPos+10);
   break;
  case SB_THUMBTRACK:
   TempPos=HIWORD(wParam);
   break;
  }
  if ((HWND)lParam == hRed) Red=TempPos;
  if ((HWND)lParam == hGreen) Green=TempPos;
  if ((HWND)lParam == hBlue) Blue=TempPos;
  if ((HWND)lParam == hText) FontSize=TempPos;
  SetScrollPos((HWND)lParam,SB_CTL,TempPos,TRUE);
  wsprintf(str,TEXT("RGB(%d, %d, %d)"),Red,Green,Blue);
  SetWindowText(hWnd,str);
  InvalidateRect(hWnd,NULL,FALSE);
  return 0;
 case WM_PAINT:
  hdc=BeginPaint(hWnd,&ps);
  hFont=CreateFont(FontSize,0,0,0,0,0,0,0,HANGEUL_CHARSET,0,0,0,VARIABLE_PITCH|FF_ROMAN,TEXT("신명조")); // 텍스트 출력
  OldFont=(HFONT)SelectObject(hdc,hFont);
  TextOut(hdc,10,400,string,lstrlen(string));
  MyBrush=CreateSolidBrush(RGB(Red,Green,Blue));
  OldBrush=(HBRUSH)SelectObject(hdc,MyBrush);
  Rectangle(hdc,10,100,410,300);
  SelectObject(hdc,OldBrush);
  DeleteObject(MyBrush);
  EndPaint(hWnd,&ps);
  return 0;
 case WM_DESTROY:
  PostQuitMessage(0);
  return 0;
 }
 return(DefWindowProc(hWnd,iMessage,wParam,lParam));
}