C / C++ / MFC

static WCHAR subject1tab[MAX_LOADSTRING]; //max_loadstring =100

INITCOMMONCONTROLSEX icce = {0};
TC_ITEM tie={0};
icce.dwICC=ICC_TAB_CLASSES;
icce.dwSize=sizeof(INITCOMMONCONTROLSEX);
InitCommonControlsEx(&icce);

tie.mask = TCIF_TEXT;
subjecthwnd=GetDlgItem(hwnd,IDC_UNICALPTUME_SUBJECT1);//I used GetDlgItem to get the handle of the combobox, from whih the text is to be copied from.

GetWindowText(subjecthwnd,subject1tab,100);//Copy the text of what the user selected from the combobox

tie.pszText=subject1tab;

SendMessage(SubjectTabs,TCM_INSERTITEM,(WPARAM)0,(LPARAM)&tie);//add a tab

static MOZ_CONSTEXPR_VAR Register CallTempNonArgRegs[] = { edi, eax, ebx, ecx, esi, edx };

static MOZ_CONSTEXPR_VAR Register eax = { X86Encoding::rax };
static MOZ_CONSTEXPR_VAR Register ecx = { X86Encoding::rcx };
static MOZ_CONSTEXPR_VAR Register edx = { X86Encoding::rdx };
static MOZ_CONSTEXPR_VAR Register ebx = { X86Encoding::rbx };
static MOZ_CONSTEXPR_VAR Register esp = { X86Encoding::rsp };
static MOZ_CONSTEXPR_VAR Register ebp = { X86Encoding::rbp };
static MOZ_CONSTEXPR_VAR Register esi = { X86Encoding::rsi };
static MOZ_CONSTEXPR_VAR Register edi = { X86Encoding::rdi };

struct Register {
    typedef Registers Codes;
    typedef Codes::Encoding Encoding;
    typedef Codes::Code Code;
    typedef Codes::SetType SetType;

    Codes::Encoding reg_;
    static Register FromCode(Code i) {
        MOZ_ASSERT(i < Registers::Total);
        Register r = { Encoding(i) };
        return r;
    }
    static Register FromName(const char* name) {
        Code code = Registers::FromName(name);
        Register r = { Encoding(code) };
        return r;
    }
    MOZ_CONSTEXPR Code code() const {
        return Code(reg_);
    }
    Encoding encoding() const {
        MOZ_ASSERT(Code(reg_) < Registers::Total);
        return reg_;
    }
    const char* name() const {
        return Registers::GetName(code());
    }
    bool operator ==(Register other) const {
        return reg_ == other.reg_;
    }
    bool operator !=(Register other) const {
        return reg_ != other.reg_;
    }
    bool volatile_() const {
        return !!((SetType(1) << code()) & Registers::VolatileMask);
    }
    bool aliases(const Register& other) const {
        return reg_ == other.reg_;
    }
    uint32_t numAliased() const {
        return 1;
    }

    // N.B. FloatRegister is an explicit outparam here because msvc-2010
    // miscompiled it on win64 when the value was simply returned.  This
    // now has an explicit outparam for compatability.
    void aliased(uint32_t aliasIdx, Register* ret) const {
        MOZ_ASSERT(aliasIdx == 0);
        *ret = *this;
    }

    SetType alignedOrDominatedAliasedSet() const {
        return SetType(1) << code();
    }

    static uint32_t SetSize(SetType x) {
        return Codes::SetSize(x);
    }
    static uint32_t FirstBit(SetType x) {
        return Codes::FirstBit(x);
    }
    static uint32_t LastBit(SetType x) {
        return Codes::LastBit(x);
    }
};