RichEdit

#define STRICT

#include <windows.h>
#include <richedit.h>

static char szAppName[] = "RicheditApp";

void AddText(HWND hwnd, char *szTextIn, COLORREF crNewColor)
{
  char *Text = (char*)malloc(lstrlen(szTextIn) + 5);
  CHARFORMAT cf;
  int iTotalTextLength = GetWindowTextLength(hwnd);
  int iStartPos = iTotalTextLength;
  int iEndPos;

  strcpy(Text, szTextIn);
  strcat(Text, "\r\n");

  SendMessage(hwnd, EM_SETSEL, (WPARAM)(int)iTotalTextLength, (LPARAM)(int)
    iTotalTextLength);
  SendMessage(hwnd, EM_REPLACESEL, (WPARAM)(BOOL)FALSE, (LPARAM)(LPCSTR)Text);

  free(Text);

  cf.cbSize = sizeof(CHARFORMAT);
  cf.dwMask = CFM_COLOR | CFM_UNDERLINE | CFM_BOLD;
  cf.dwEffects = (unsigned long)~(CFE_AUTOCOLOR | CFE_UNDERLINE | CFE_BOLD);
  cf.crTextColor = crNewColor;

  iEndPos = GetWindowTextLength(hwnd);

  SendMessage(hwnd, EM_SETSEL, (WPARAM)(int)iStartPos, (LPARAM)(int)iEndPos);
  SendMessage(hwnd, EM_SETCHARFORMAT, (WPARAM)(UINT)SCF_SELECTION, (LPARAM) &cf)
    ;
  SendMessage(hwnd, EM_HIDESELECTION, (WPARAM)(BOOL)TRUE, (LPARAM)(BOOL)FALSE);

  SendMessage(hwnd, EM_LINESCROLL, (WPARAM)(int)0, (LPARAM)(int)1);
}

LRESULT CALLBACK WndProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
{
  static HWND hWndEdit;
  static int iStartPos, iEndPos;
  CHARFORMAT cf;
  CREATESTRUCT *cs;
  RECT rect;

  switch (iMsg)
  {
    case WM_CREATE:
      cs = (LPCREATESTRUCT)lParam;
      hWndEdit = CreateWindowEx(WS_EX_CLIENTEDGE, "RichEdit", NULL, WS_CHILD |
        WS_CLIPCHILDREN | ES_WANTRETURN | ES_MULTILINE | WS_VISIBLE | ES_LEFT,
        0, 0, 1, 1, hwnd, NULL, cs->hInstance, NULL);

      SendMessage(hWndEdit, EM_SETWORDBREAKPROCEX, (WPARAM)0, (LPARAM)NULL);

      cf.cbSize = sizeof(CHARFORMAT);
      cf.dwMask = CFM_FACE | CFM_SIZE;
      cf.yHeight = 180;
      strcpy(cf.szFaceName, "MS Sans Serif");
      SendMessage(hWndEdit, EM_SETCHARFORMAT, (WPARAM)(UINT)0, (LPARAM) &cf);

      AddText(hWndEdit, "Hello world", RGB(164, 0, 0));
      break;

    case WM_SIZE:
      GetClientRect(hwnd, &rect);
      MoveWindow(hWndEdit, 3, 3, rect.right - 6, rect.bottom - 6, 1);
      break;

    case WM_CLOSE:
      DestroyWindow(hwnd);
      break;

    case WM_DESTROY:
      PostQuitMessage(0);
      break;
  }
  return DefWindowProc(hwnd, iMsg, wParam, lParam);
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine,
  int iCmdShow)
{
  HWND hwnd;
  MSG msg;
  WNDCLASS wndclass;
  HINSTANCE hRichEdit;

  wndclass.style = 0;
  wndclass.lpfnWndProc = WndProc;
  wndclass.cbClsExtra = 0;
  wndclass.cbWndExtra = 0;
  wndclass.hInstance = hInstance;
  wndclass.hIcon = LoadIcon(hInstance, szAppName);
  wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
  wndclass.hbrBackground = (HBRUSH)(COLOR_BTNFACE + 1);
  wndclass.lpszMenuName = szAppName;
  wndclass.lpszClassName = szAppName;
  RegisterClass(&wndclass);

  hRichEdit = LoadLibrary("RICHED32.DLL");

  hwnd = CreateWindow(szAppName, szAppName, WS_OVERLAPPEDWINDOW | WS_VISIBLE, 0,
    0, 400, 400, NULL, NULL, hInstance, szCmdLine);

  while (GetMessage(&msg, NULL, 0, 0))
  {
    TranslateMessage(&msg);
    DispatchMessage(&msg);
  }

  FreeLibrary(hRichEdit);

  return (int)msg.wParam;
}