I get an error for the following code: _________________________________________________________________ if(ChangeDisplaySettings(&dmScreenSettings, CDS_FULLSCREEN)!= DISP_CHAN_SUCCESSFUL) { //Setting display mode failed. MessageBox(NULL, "Display mode failed!", NULL, MB_OK); fullscreen=FALSE; } //End of if(). _________________________________________________________________ it says that CDS_FULLSCREEN is undeclared! i am so confused. i can''t even get my FIRST application to run! somebody please help.

Thanks guys! that worked PERFECTLY! but now i have a bigger problem...


When i try to compile, it doesn''t have errors or anything, but i get this:

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c:\csi\projects\game\maingame.cpp: In function `int WinMain(HINSTANCE__ *, HINSTANCE__ *, CHAR *, int)'':
c:\csi\projects\game\maingame.cpp:273: warning: converting NULL to non-pointer type
c:\csi\projects\game\maingame.cpp:285: warning: converting NULL to non-pointer type
c:\csi\projects\game\maingame.cpp:285: warning: converting NULL to non-pointer type
C:\WINDOWS\TEMP\ccFOVhgb.o(.text+0xf):maingame.cpp: undefined reference to `glEnable@4''
C:\WINDOWS\TEMP\ccFOVhgb.o(.text+0x1f):maingame.cpp: undefined reference to `glClearColor@16''
C:\WINDOWS\TEMP\ccFOVhgb.o(.text+0x2c):maingame.cpp: undefined reference to `glClear@4''
C:\WINDOWS\TEMP\ccFOVhgb.o(.text+0x34):maingame.cpp: undefined reference to `glLoadIdentity@0''
C:\WINDOWS\TEMP\ccFOVhgb.o(.text+0x39):maingame.cpp: undefined reference to `glFlush@0''
C:\WINDOWS\TEMP\ccFOVhgb.o(.text+0x47):maingame.cpp: undefined reference to `SwapBuffers@4''
C:\WINDOWS\TEMP\ccFOVhgb.o(.text+0x67):maingame.cpp: undefined reference to `ChoosePixelFormat@8''
C:\WINDOWS\TEMP\ccFOVhgb.o(.text+0x84):maingame.cpp: undefined reference to `SetPixelFormat@12''
C:\WINDOWS\TEMP\ccFOVhgb.o(.text+0x11b):maingame.cpp: undefined reference to `wglCreateContext@4''
C:\WINDOWS\TEMP\ccFOVhgb.o(.text+0x139):maingame.cpp: undefined reference to `wglMakeCurrent@8''
C:\WINDOWS\TEMP\ccFOVhgb.o(.text+0x15c):maingame.cpp: undefined reference to `wglMakeCurrent@8''
C:\WINDOWS\TEMP\ccFOVhgb.o(.text+0x16d):maingame.cpp: undefined reference to `wglDeleteContext@4''
C:\WINDOWS\TEMP\ccFOVhgb.o(.text+0x1bd):maingame.cpp: undefined reference to `glViewport@16''
C:\WINDOWS\TEMP\ccFOVhgb.o(.text+0x1ca):maingame.cpp: undefined reference to `glMatrixMode@4''
C:\WINDOWS\TEMP\ccFOVhgb.o(.text+0x1d2):maingame.cpp: undefined reference to `glLoadIdentity@0''
C:\WINDOWS\TEMP\ccFOVhgb.o(.text+0x204):maingame.cpp: undefined reference to `gluPerspective@32''
C:\WINDOWS\TEMP\ccFOVhgb.o(.text+0x211):maingame.cpp: undefined reference to `glMatrixMode@4''
C:\WINDOWS\TEMP\ccFOVhgb.o(.text+0x219):maingame.cpp: undefined reference to `glLoadIdentity@0''
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what am i supposed to do NOW?

umm...how do you do that?!

In Dev-C++ you can go to the project options (I think you can press alt+p to get there) and there is a text box somewhere for you to add options for when it calls the linker. The -l switch tells it you want to link to a library, and you follow it with it''s name, so you will put -lopengl32 and -lglu32 in that box.

While you''re there, you might want to add -Wall to the compiler options. (it''s case sensitive!) This will cause the compiler to tell you when you do stupid things, like statements that do nothing, writing if(a=4), declaring variables and not using them, not initializing variables, and other odd things like that that tend to make people scream.

quote:Original post by Monder
just put

#define CDS_FULLSCREEN 4

at the top of your code and everything should work fine

You should probably use

#ifndef CDS_FULLSCREEN
#define CDS_FULLSCREEN 4
#endif

so it works for people who don''t have buggy headers.