Code:
LRESULT CALLBACK MDIChildWndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) {
switch(msg) {
case WM_CREATE:
{
HFONT hfDefault;
HWND hEdit;
hEdit = CreateWindowEx(WS_EX_CLIENTEDGE, "EDIT", "",
WS_CHILD | WS_VISIBLE | WS_VSCROLL | WS_HSCROLL | ES_MULTILINE | ES_AUTOVSCROLL | ES_AUTOHSCROLL,
0, 0, 100, 100, hwnd, (HMENU)ID_CHILD_EDIT, GetModuleHandle(NULL), NULL);
if(hEdit == NULL) {
MessageBox(hwnd, "Could not create edit box.", "Error", MB_OK | MB_ICONERROR);
}
hfDefault = GetStockObject(DEFAULT_GUI_FONT);
SendMessage(hEdit, WM_SETFONT, (WPARAM)hfDefault, MAKELPARAM(FALSE, 0));
}
break;
case WM_CTLCOLOREDIT:
{
HDC dc = (HDC)wParam;
SetTextColor(dc, RGB(255, 0, 0));
}
break;
case WM_SIZE:
{
HWND hEdit;
RECT rcClient;
GetClientRect(hwnd, &rcClient);
hEdit = GetDlgItem(hwnd, ID_CHILD_EDIT);
SetWindowPos(hEdit, NULL, 0, 0, rcClient.right, rcClient.bottom, SWP_NOZORDER);
}
return DefMDIChildProc(hwnd, msg, wParam, lParam);
case WM_MDIACTIVATE:
{
HMENU hMenu, hFileMenu;
UINT EnableFlag;
hMenu = GetMenu(g_hMainWindow);
if(hwnd == (HWND)lParam) {
EnableFlag = MF_ENABLED;
} else {
EnableFlag = MF_GRAYED;
}
EnableMenuItem(hMenu, 1, MF_BYPOSITION | EnableFlag);
EnableMenuItem(hMenu, 2, MF_BYPOSITION | EnableFlag);
hFileMenu = GetSubMenu(hMenu, 0);
EnableMenuItem(hFileMenu, ID_FILE_SAVEAS, MF_BYCOMMAND | EnableFlag);
EnableMenuItem(hFileMenu, ID_WINDOW_CLOSE, MF_BYCOMMAND | EnableFlag);
EnableMenuItem(hFileMenu, ID_WINDOW_CLOSEALL, MF_BYCOMMAND | EnableFlag);
DrawMenuBar(g_hMainWindow);
}
break;
case WM_ERASEBKGND:
return 1;
case WM_COMMAND:
switch(LOWORD(wParam)) {
case ID_FILE_SAVEAS:
DoFileSaveAs(hwnd);
break;
case ID_EDIT_CUT:
SendDlgItemMessage(hwnd, ID_CHILD_EDIT, WM_CUT, 0, 0);
break;
case ID_EDIT_COPY:
SendDlgItemMessage(hwnd, ID_CHILD_EDIT, WM_COPY, 0, 0);
break;
case ID_EDIT_PASTE:
SendDlgItemMessage(hwnd, ID_CHILD_EDIT, WM_PASTE, 0, 0);
break;
case ID_EDIT_UNDO:
{
if(SendMessage(hwnd, EM_CANUNDO, 0, 0)) {
SendMessage(hwnd, WM_UNDO, 0, 0);
} else {
MessageBox(hwnd, "Nothing to undo.", "Unable to undo!", MB_OK);
}
}
break;
}
break;
default:
return DefMDIChildProc(hwnd, msg, wParam, lParam);
}
return 0;
}
Thanks