ESF Source Code Error?????

--------------------Configuration: cl_dll - Win32 Debug--------------------
Compiling...
ev_hldm.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
hl_baseentity.cpp
fatal error C1083: Cannot open source file: 'C:\Windows\Desktop\Alpha_20\Cl_dll\hl\hl_baseentity.cpp': No such file or directory
hl_events.cpp
fatal error C1083: Cannot open source file: 'C:\Windows\Desktop\Alpha_20\Cl_dll\hl\hl_events.cpp': No such file or directory
hl_objects.cpp
fatal error C1083: Cannot open source file: 'C:\Windows\Desktop\Alpha_20\Cl_dll\hl\hl_objects.cpp': No such file or directory
hl_weapons.cpp
fatal error C1083: Cannot open source file: 'C:\Windows\Desktop\Alpha_20\Cl_dll\hl\hl_weapons.cpp': No such file or directory
ammo.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
ammo_secondary.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
ammohistory.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
attackcharge.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
battery.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
cdll_int.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
com_weapons.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
credits.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
death.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
demo.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
entity.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
ev_common.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
events.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
explosion.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
flashlight.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
geiger.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
health.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
hud.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
hud_msg.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
hud_redraw.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
hud_servers.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
hud_update.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
in_camera.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
input.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
inputw32.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
menu.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
message.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
mp3player.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
pm_debug.c
fatal error C1083: Cannot open source file: 'C:\Windows\Desktop\Alpha_20\pm_shared\pm_debug.c': No such file or directory
pm_math.c
fatal error C1083: Cannot open source file: 'C:\Windows\Desktop\Alpha_20\pm_shared\pm_math.c': No such file or directory
pm_shared.c
fatal error C1083: Cannot open source file: 'C:\Windows\Desktop\Alpha_20\pm_shared\pm_shared.c': No such file or directory
powerlevel.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
powerstruggle.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
saytext.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
sensubean.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
speed.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
spiritbombcharge.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
status_icons.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
statusbar.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
text_message.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
trail.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
train.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
tri.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
util.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
vgui_ClassMenu.cpp
C:\Windows\Desktop\Alpha_20\Cl_dll\vgui_ClassMenu.cpp(19) : fatal error C1083: Cannot open include file: 'VGUI_Font.h': No such file or directory
vgui_ConsolePanel.cpp
c:\windows\desktop\alpha_20\cl_dll\vgui_consolepanel.h(6) : fatal error C1083: Cannot open include file: 'VGUI_Panel.h': No such file or directory
vgui_ControlConfigPanel.cpp
c:\windows\desktop\alpha_20\cl_dll\vgui_controlconfigpanel.h(5) : fatal error C1083: Cannot open include file: 'VGUI_Panel.h': No such file or directory
vgui_CustomObjects.cpp
C:\Windows\Desktop\Alpha_20\Cl_dll\vgui_CustomObjects.cpp(19) : fatal error C1083: Cannot open include file: 'VGUI_Font.h': No such file or directory
vgui_int.cpp
C:\Windows\Desktop\Alpha_20\Cl_dll\vgui_int.cpp(3) : fatal error C1083: Cannot open include file: 'VGUI_Label.h': No such file or directory
vgui_MOTDWindow.cpp
C:\Windows\Desktop\Alpha_20\Cl_dll\vgui_MOTDWindow.cpp(19) : fatal error C1083: Cannot open include file: 'VGUI_Font.h': No such file or directory
vgui_mp3menu.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
vgui_SchemeManager.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
vgui_ScorePanel.cpp
C:\Windows\Desktop\Alpha_20\Cl_dll\vgui_ScorePanel.cpp(20) : fatal error C1083: Cannot open include file: 'VGUI_LineBorder.h': No such file or directory
vgui_ServerBrowser.cpp
C:\Windows\Desktop\Alpha_20\Cl_dll\vgui_ServerBrowser.cpp(2) : fatal error C1083: Cannot open include file: 'VGUI_HeaderPanel.h': No such file or directory
vgui_TeamFortressViewport.cpp
C:\Windows\Desktop\Alpha_20\Cl_dll\vgui_TeamFortressViewport.cpp(18) : fatal error C1083: Cannot open include file: 'VGUI_Cursor.h': No such file or directory
vgui_teammenu.cpp
C:\Windows\Desktop\Alpha_20\Cl_dll\vgui_teammenu.cpp(20) : fatal error C1083: Cannot open include file: 'VGUI_Font.h': No such file or directory
view.cpp
c:\windows\desktop\alpha_20\cl_dll\cl_dll.h(36) : fatal error C1083: Cannot open include file: '../engine/cdll_int.h': No such file or directory
Error executing cl.exe.

client.dll - 62 error(s), 0 warning(s)
============================================
Ummmm does anyone know why i get these errors??

You cant compile it directly, since its missing 1/2 of the other folders ( like pm shared ). I suppose your only suppose to use it as reference.