Error that I don't understand

Hi,
I've got this error when I compile
[ERROR]: e:/blitzmaxbeta103/wingui/.bmx/gui_example.bmx.d.o(code+0xad9): undefined reference to `SendMessage@16'
[ERROR]: e:/blitzmaxbeta103/wingui/.bmx/gui_example.bmx.d.o(code+0xb0b): undefined reference to `SetWindowText@8'
[ERROR]: e:/blitzmaxbeta103/wingui/.bmx/gui_example.bmx.d.o(code+0x1341): undefined reference to `GetclientRect@8'
[ERROR]: e:/blitzmaxbeta103/wingui/.bmx/gui_example.bmx.d.o(code+0x13fa): undefined reference to `GetclientRect@8'
[ERROR]: e:/blitzmaxbeta103/wingui/.bmx/gui_example.bmx.d.o(code+0x1934): undefined reference to `GetclientRect@8'
[ERROR]: e:/blitzmaxbeta103/wingui/.bmx/gui_example.bmx.d.o(code+0x19c2): undefined reference to `GetclientRect@8'
[ERROR]: e:/blitzmaxbeta103/wingui/.bmx/gui_example.bmx.d.o(code+0x1e1d): undefined reference to `LOWORD@4'
[ERROR]: e:/blitzmaxbeta103/wingui/.bmx/gui_example.bmx.d.o(code+0x1e39): undefined reference to `HIWORD@4'
[ERROR]: e:/blitzmaxbeta103/wingui/.bmx/gui_example.bmx.d.o(code+0x1e5f): undefined reference to `SendMessage@16'
[ERROR]: e:/blitzmaxbeta103/wingui/.bmx/gui_example.bmx.d.o(code+0x1e7b): undefined reference to `SendMessage@16'
[ERROR]: e:/blitzmaxbeta103/wingui/.bmx/gui_example.bmx.d.o(code+0x3890): undefined reference to `SetWindowText@8'
[ERROR]: e:/blitzmaxbeta103/wingui/.bmx/gui_example.bmx.d.o(code+0x391c): undefined reference to `GetWindowText@12'
[ERROR]: e:/blitzmaxbeta103/wingui/.bmx/gui_example.bmx.d.o(code+0x39c2): undefined reference to `GetWindowText@12'
[ERROR]: e:/blitzmaxbeta103/wingui/.bmx/gui_example.bmx.d.o(code+0x3be5): undefined reference to `muldiv@12'
[ERROR]: e:/blitzmaxbeta103/wingui/.bmx/gui_example.bmx.d.o(code+0x3c24): undefined reference to `CreateFont@56'
[ERROR]: e:/blitzmaxbeta103/wingui/.bmx/gui_example.bmx.d.o(code+0x3c54): undefined reference to `SendMessage@16'
[ERROR]: e:/blitzmaxbeta103/wingui/.bmx/gui_example.bmx.d.o(code+0x3d1c): undefined reference to `GetWindowLong@8'
[ERROR]: e:/blitzmaxbeta103/wingui/.bmx/gui_example.bmx.d.o(code+0x3d53): undefined reference to `SetWindowLong@12'
[ERROR]: e:/blitzmaxbeta103/wingui/.bmx/gui_example.bmx.d.o(code+0x3e16): undefined reference to `GetWindowLong@8'
[ERROR]: e:/blitzmaxbeta103/wingui/.bmx/gui_example.bmx.d.o(code+0x3e4d): undefined reference to `SetWindowLong@12'
[ERROR]: e:/blitzmaxbeta103/wingui/.bmx/gui_example.bmx.d.o(code+0x3f1b): undefined reference to `GetWindowLong@8'
[ERROR]: e:/blitzmaxbeta103/wingui/.bmx/gui_example.bmx.d.o(code+0x3f52): undefined reference to `SetWindowLong@12'
[ERROR]: e:/blitzmaxbeta103/wingui/.bmx/gui_example.bmx.d.o(code+0x3fe4): undefined reference to `GetclientRect@8'
[ERROR]: e:/blitzmaxbeta103/wingui/.bmx/gui_example.bmx.d.o(code+0x41b7): undefined reference to `GetclientRect@8'

I declare all this Win32 function in User32.Bmx in the Win32 Module

If you are doing makemodules to compile the modified module and it doesn't generate any errors then maybe you should post your modified User32.bmx file.