Rich Text Edit Control Example

Most common controls (such as TreeView, ListView, Toolbar, Status Bar, TrackBar, Up-Down, Tab Control, and Progress Bar) are built into COMCTL32.DLL, so you simply call InitCommonControls() or InitCommonControlsEx() with the appropriate ICC_* class flag before creating them. A Rich Edit control is different because it is not part of COMCTL32.DLL; it is implemented in a separate DLL (RICHED32.DLL or RICHED20.DLL). Therefore, before creating a Rich Edit control, you must first load the Rich Edit DLL using LoadLibrary(). Once the DLL has been loaded, create the control by specifying RICHEDIT_CLASS (or RICHEDIT_CLASSW) as the window class name. Unlike the other common controls, the Rich Edit control does not require an ICC_* initialization flag because loading the Rich Edit DLL automatically registers the Rich Edit window class.

#define _WIN32_WINNT 0x0501
#include <windows.h>
#include <commctrl.h>
#include <richedit.h>


#pragma comment(lib, "comctl32.lib")

#define ID_EDIT 1
#define ID_ITALICBUTTON 2
#define ID_UNDERLINEBUTTON 3
#define ID_BOLDBUTTON 4

HMODULE hMod;

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
    LPSTR lpCmdLine, int nCmdShow)
{
    hMod = LoadLibrary(TEXT("Riched20.dll"));

    WNDCLASSEX wc;
    MSG msg;

    wc.cbSize = sizeof(WNDCLASSEX);
    wc.style = 0;
    wc.lpfnWndProc = WndProc;
    wc.cbClsExtra = 0;
    wc.cbWndExtra = 0;
    wc.hInstance = hInstance;
    wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
    wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
    wc.lpszMenuName = NULL;
    wc.lpszClassName = TEXT("myWindowClass");
    wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION);

    RegisterClassEx(&wc);

    //Creating the Window
    CreateWindowEx(
        WS_EX_CLIENTEDGE,
        TEXT("myWindowClass"),
        TEXT("Rich Edit Control Demo"),
        WS_VISIBLE | WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT,
        CW_USEDEFAULT,
        300,
        220,
        NULL,
        NULL,
        hInstance,
        NULL);

    //The Message Loop
    while (GetMessage(&msg, NULL, 0, 0) > 0)
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    return msg.wParam;
}

LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
    static HWND hwndEdit;
    static HWND hwndItalicButton;
    static HWND hwndUnderlineButton;
    static HWND hwndBoldButton;

    switch (msg)
    {
    case WM_CREATE:
    {
        //load common control class ICC_USEREX_CLASSES from the dynamic-link library (DLL)
        INITCOMMONCONTROLSEX icex;
        icex.dwSize = sizeof(INITCOMMONCONTROLSEX);
        icex.dwICC = ICC_USEREX_CLASSES;
        InitCommonControlsEx(&icex);

        hwndEdit = CreateWindowEx(
            WS_EX_CLIENTEDGE,
            RICHEDIT_CLASS,
            NULL,
            WS_CHILD | WS_VISIBLE | ES_MULTILINE |
            WS_HSCROLL | WS_VSCROLL,
            10,
            10,
            250,
            100,
            hwnd,
            (HMENU)ID_EDIT,
            GetModuleHandle(NULL),
            NULL);

        //create buttons
        hwndItalicButton = CreateWindowEx(
            0,
            TEXT("BUTTON"),
            TEXT("Italic"),
            BS_AUTOCHECKBOX | BS_NOTIFY | BS_PUSHLIKE |
            WS_CHILD | WS_VISIBLE | BS_DEFPUSHBUTTON,
            10,
            130,
            80,
            30,
            hwnd,
            (HMENU)ID_ITALICBUTTON,
            GetModuleHandle(NULL),
            NULL);

        hwndUnderlineButton = CreateWindow(
            TEXT("BUTTON"),
            TEXT("Underline"),
            BS_AUTOCHECKBOX | BS_PUSHLIKE | WS_VISIBLE | WS_CHILD,
            95,
            130,
            80,
            30,
            hwnd,
            (HMENU)ID_UNDERLINEBUTTON,
            NULL,
            NULL);

        hwndBoldButton = CreateWindow(
            TEXT("BUTTON"),
            TEXT("Bold"),
            BS_AUTOCHECKBOX | BS_PUSHLIKE | WS_VISIBLE | WS_CHILD,
            180,
            130,
            80,
            30,
            hwnd,
            (HMENU)ID_BOLDBUTTON,
            NULL,
            NULL);

        CHARFORMAT cf = {0};
        cf.cbSize = sizeof(CHARFORMAT);
        cf.dwEffects = 0;
        cf.dwMask = CFM_BOLD;

        SendMessage(hwndEdit,
                    EM_SETCHARFORMAT,
                    SCF_SELECTION,
                    (LPARAM)&cf);
    }
    break;

    case WM_COMMAND:

        if (HIWORD(wParam) == BN_CLICKED)
        {
            CHARFORMAT cf = {0};
            cf.cbSize = sizeof(CHARFORMAT);

            switch (LOWORD(wParam))
            {
            case ID_ITALICBUTTON:

                if (IsDlgButtonChecked(hwnd, ID_ITALICBUTTON))
                {
                    cf.dwEffects = CFE_ITALIC;
                    cf.dwMask = CFM_ITALIC;
                }
                else
                {
                    cf.dwEffects = 0;
                    cf.dwMask = CFM_ITALIC;
                }

                SendMessage(hwndEdit,
                            EM_SETCHARFORMAT,
                            SCF_SELECTION,
                            (LPARAM)&cf);
                break;

            case ID_UNDERLINEBUTTON:

                if (IsDlgButtonChecked(hwnd, ID_UNDERLINEBUTTON))
                {
                    cf.dwEffects = CFE_UNDERLINE;
                    cf.dwMask = CFM_UNDERLINE;
                }
                else
                {
                    cf.dwEffects = 0;
                    cf.dwMask = CFM_UNDERLINE;
                }

                SendMessage(hwndEdit,
                            EM_SETCHARFORMAT,
                            SCF_SELECTION,
                            (LPARAM)&cf);
                break;

            case ID_BOLDBUTTON:

                if (IsDlgButtonChecked(hwnd, ID_BOLDBUTTON))
                {
                    cf.dwEffects = CFE_BOLD;
                    cf.dwMask = CFM_BOLD;
                }
                else
                {
                    cf.dwEffects = 0;
                    cf.dwMask = CFM_BOLD;
                }

                SendMessage(hwndEdit,
                            EM_SETCHARFORMAT,
                            SCF_SELECTION,
                            (LPARAM)&cf);
                break;
            }
        }
        break;

    case WM_DESTROY:

        if (hMod)
            FreeLibrary(hMod);

        PostQuitMessage(0);
        break;
    }

    return DefWindowProc(hwnd, msg, wParam, lParam);
}