Hola que tal?
Ahora no tengo un constructor en CProcess, pero si en pila, ya que lo necesito para crearla. 
Porque me vuelve a dar este error si esta ya inicializada?
Linking...
   Creating library Debug/CProcess.lib and object Debug/CProcess.exp
CProcess.exp : warning LNK4070: /OUT:CProcess.dll directive in .EXP differs from output filename "Debug/CProcess.exe"; ignoring directive
Debug/CProcess.exe : warning LNK4086: entrypoint "_mainCRTStartup" is not __stdcall with 12 bytes of arguments; image may not run
LIBCD.lib(crt0.obj) : error LNK2001: unresolved external symbol _main
Debug/CProcess.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.
CProcess.exe - 2 error(s), 2 warning(s)
- typedef char Tpalabra [20]; 
-   
- class CProcess 
- { 
- private: 
-     Tpalabra imageName; 
-     float cpuUsage; 
-     int memUsage; 
-   
- public: 
-     CProcess(); 
-     void pon_imageName(char name[20]); 
-     char* dame_imageName(); 
-     void pon_cpuUsage(float cpu); 
-  float dame_cpuUsage(); 
-     void pon_memUsage(int mem); 
-     int dame_memUsage(); 
-     float valor_inicial_cpu(); 
-     int valor_inical_mem(); 
- }; 
-   
- #include "CProcess.h" 
- #define MAXPILA 5 
-   
- class CPila 
- { 
- private: 
-     CProcess Vector[MAXPILA]; 
-     int CimPila; 
-   
- public: 
-     CPila(void); 
-     int PilaVacia(void); 
-     int PilaLlena(void); 
-     void PushPila(CProcess &c); 
-     CProcess PopPila(void); 
- }; 
-   
- #include "CProcess.h" 
- #include <string.h> 
-   
- void CProcess::pon_imageName(Tpalabra name) 
- { 
-     strcpy(imageName,name); 
- } 
-   
- Tpalabra* CProcess::dame_imageName() 
- { 
-     return (&imageName); 
- } 
-   
- void CProcess::pon_cpuUsage(float cpu) 
- { 
-     cpuUsage=cpu; 
- } 
-   
- float CProcess::dame_cpuUsage() 
- { 
-     return (cpuUsage); 
- } 
-   
- void CProcess::pon_memUsage(int mem) 
- { 
-     memUsage=mem; 
- } 
-   
- int CProcess::dame_memUsage() 
- { 
-     return (memUsage); 
- } 
-   
- #include "pila.h" 
-   
- CPila::CPila(void) 
- { 
-     CimPila=-1; 
- } 
- int CPila::PilaVacia(void) 
- { 
-     return(CimPila==-1); 
- } 
- int CPila::PilaLlena(void) 
- { 
-     return(CimPila==MAXPILA-1); 
- } 
- void CPila::PushPila(CProcess &p) 
- { 
-    Vector[++CimPila]=p; 
- } 
- CProcess CPila::PopPila(void) 
- { 
-     return(Vector[CimPila--]); 
- } 
-   
- #include "Windows.h" 
- #include "pila.h" 
-   
-   
- CProcess my_Process; 
- CPila mi_pila; 
-   
-   
-   
- int FAR PASCAL DLLanade_proceso(Tpalabra name, float cpu, int mem) 
- { 
-     CProcess c; 
-   
-     if (mi_pila.PilaLlena()) 
-         return -1; 
-     else { 
-         c.pon_imageName(name); 
-         c.pon_cpuUsage(cpu); 
-         c.pon_memUsage(mem); 
-   
-         mi_pila.PushPila(c); 
-         return 0; 
-     } 
- } 
-   
- int FAR PASCAL DLLquita_proceso(Tpalabra name, float* cpu, int* mem) 
- { 
-     if (mi_pila.PilaVacia()) 
-         return -1; 
-     else { 
-         CProcess c = mi_pila.PopPila(); 
-         strcpy(name, *c.dame_imageName()); 
-         *cpu = c.dame_cpuUsage(); 
-         *mem = c.dame_memUsage(); 
-   
-         return 0; 
-     } 
- } 
-   
LIBRARY CProcess.dll
DESCRIPTION 'DLL cola de procesos'
HEAPSIZE 1024
EXPORTS
   DLLanade_proceso   @1
   DLLquita_proceso   @2