Help Needed: Error C++

1>------ Build started: Project: Menu Base, Configuration: Release Win32 ------
1>Compiling...
1>Brain.cpp
1>Linking...
1>Brain.obj : error LNK2001: unresolved external symbol _D3DXCreateFontA@48
1>C:\Users\CookiE\Desktop\Ac1d's Base\Release\Menu Base.dll : fatal error LNK1120: 1 unresolved externals
1>Build log was saved at "file://c:\Users\CookiE\Desktop\Ac1d's Base\Menu Base\Release\BuildLog.htm"
1>Menu Base - 2 error(s), 0 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

void ReFont(LPDIRECT3DDEVICE9 pDevice)
{
if (g_pDevice != pDevice)
{
g_pDevice = pDevice;
try
{
if (pFont != 0)
pFont->Release();
} catch (...) {}
pFont = 0;
D3DXCreateFont(pDevice, 12, 0, FW_BOLD, 1, 0, DEFAULT_CHARSET, OUT_DEFAULT_PRECIS, DEFAULT_QUALITY, DEFAULT_PITCH | FF_DONTCARE, "Arial", &pFont);
}
}