AfxGetInstanceHandle() return null in regular mfc dll

See more:

MFC

Hello!
Application loads the regular dll. Each function in this dll contains AFX_MANAGE_STATE(AfxGetStaticModuleState()). In the preprocessor definitions included macro _USRDLL and _AFXDLL. For example, export function from regular dll (mydll.dll):

BOOL RM_GetModule(IRMPage** ppInterface)
{
    AFX_MANAGE_STATE(AfxGetStaticModuleState());
    HINSTANCE hInst = AfxGetInstanceHandle(); //return NULL
    ........
}

application:

BOOL CReMain2Dlg::OnInitDialog()
{
    CDialog::OnInitDialog();
    ..........
    HINSTANCE hmCurrentModule;
    if((hmCurrentModule = AfxLoadLibrary("mydll.dll"))){
        (FARPROC&)pPageItem->pfGetModule = GetProcAddress(
                                        hmCurrentModule, "RM_GetModule");
        pPageItem->pfGetModule(&(pPageItem->pPage)); //call
        ..........
    }
}

The project was transferred out of 6 studios at 2010. At 6 AfxGetInstanceHandle() return correct value. Why AfxGetInstanceHandle() return NULL? How to fix it?
vs2010_sp1, win7_x64