FPCM_TSETPROPERTYNUM

struct SFPCTSetPropertyNum
{
    // [in]
    struct
    {
        LPCTSTR lpszBuffer;

    } target;

    // [in]
    int property;
    // [in]
    double value;


    // [out]
    HRESULT hr;
};

void InvokeTSetPropertyNum(HWND hwndFlashPlayerControl, LPCTSTR target, int property, double value)
{
    SFPCTSetPropertyNum info;


    info.target.lpszBuffer = target;

    info.property = property;

    info.value = value;


    ::SendMessage(hwndFlashPlayerControl, FPCM_TSETPROPERTYNUM, 0, (LPARAM)&info);


    if FAILED(info.hr)
        // Error
    {
            // ...
    }
    else
        // OK
    {

        // ...

    }
}