Can not run the example program

[Guest]

I want to run the gflexample,but it has a link error.
how to fix it?i really want to know!
thx!
Linking...
gflwBitmap.obj : error LNK2001: unresolved external symbol _gflNegative@8
gflwBitmap.obj : error LNK2001: unresolved external symbol _gflBrightness@12
gflwBitmap.obj : error LNK2001: unresolved external symbol _gflContrast@12
gflwBitmap.obj : error LNK2001: unresolved external symbol _gflGamma@16
gflwBitmap.obj : error LNK2001: unresolved external symbol _gflAverage@12
gflwBitmap.obj : error LNK2001: unresolved external symbol _gflSoften@12
gflwBitmap.obj : error LNK2001: unresolved external symbol _gflBlur@12
gflwBitmap.obj : error LNK2001: unresolved external symbol _gflGaussianBlur@12
gflwBitmap.obj : error LNK2001: unresolved external symbol _gflMaximum@12
gflwBitmap.obj : error LNK2001: unresolved external symbol _gflMinimum@12
gflwBitmap.obj : error LNK2001: unresolved external symbol _gflMedianBox@12
gflwBitmap.obj : error LNK2001: unresolved external symbol _gflMedianCross@12
gflwBitmap.obj : error LNK2001: unresolved external symbol _gflSharpen@12
gflwBitmap.obj : error LNK2001: unresolved external symbol _gflDrawPointColor@24
gflwBitmap.obj : error LNK2001: unresolved external symbol _gflDrawLineColor@36
gflwBitmap.obj : error LNK2001: unresolved external symbol _gflDrawPolylineColor@28
gflwBitmap.obj : error LNK2001: unresolved external symbol _gflDrawPolygonColor@32
gflwBitmap.obj : error LNK2001: unresolved external symbol _gflDrawRectangleColor@40
gflwBitmap.obj : error LNK2001: unresolved external symbol _gflDrawCircleColor@36
gflw___Win32_Debug/gflw.exe : fatal error LNK1120: 19 unresolved externals
Error executing link.exe.

[xnview]

...
gflwBitmap.obj : error LNK2001: unresolved external symbol _gflDrawRectangleColor@40
gflwBitmap.obj : error LNK2001: unresolved external symbol _gflDrawCircleColor@36
gflw___Win32_Debug/gflw.exe : fatal error LNK1120: 19 unresolved externals
Error executing link.exe.

libgfle.dll/lib is missing