Thread: Driver Problem

I am compiling with WINDDK Windows Server 2003 Build Environment and I get a lot of errors. I am so lost. Can anybody please tell me what I am doing wrong?

Code:

#include <ntddk.h>

void DriverUnload(PDRIVER_OBJECT pDriverObject)
{
    DbgPrint("DriverExit\n");
}

NTSTATUS DriverEntry(PDRIVER_OBJECT DriverObject, PUNICODE_STRING RegistryPath)
{
    DriverObject->DriverUnload = DriverUnload;
	
    DbgPrint("DriverEntry\n");

	HANDLE gbHandle = FindWindow(0, "Calculator");

	if (gbHandle != NULL) {
		DWORD wtpID;
		GetWindowThreadProcessId(hWnd, &wtpID);
		HANDLE gbProcess = OpenProcess(PROCESS_ALL_ACCESS, FALSE, wtpID); 
		BYTE hdata[]={0x72, 0x6F};
		DWORD sizehdata = sizeof(hdata);
		WriteProcessMemory(gbProcess, (LPVOID)0x5C6600, &hdata, sizehdata, NULL));
		CloseHandle(gbProcess);	
	}

    return STATUS_SUCCESS;
}

Code:

Compiling - main.c for i386
errors in directory d:\winddk\3790~1.183\src\ddriver\devicedriver
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(14) : error C2143: syntax er
ror : missing ';' before 'type'
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(16) : error C2065: 'gbHandle
' : undeclared identifier
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(16) : error C4047: '!=' : 'i
nt' differs in levels of indirection from 'void *'
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(20) : error C2065: 'DWORD' :
 undeclared identifier
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(20) : error C2146: syntax er
ror : missing ';' before identifier 'wtpID'
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(20) : error C2144: syntax er
ror : '<Unknown>' should be preceded by '<Unknown>'
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(20) : error C2144: syntax er
ror : '<Unknown>' should be preceded by '<Unknown>'
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(20) : error C2143: syntax er
ror : missing ';' before 'identifier'
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(20) : error C2065: 'wtpID' :
 undeclared identifier
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(22) : error C4013: 'GetWindo
wThreadProcessId' undefined; assuming extern returning int
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(22) : error C2065: 'hWnd' :
undeclared identifier
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(23) : error C2275: 'HANDLE'
: illegal use of this type as an expression
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(23) : error C2146: syntax er
ror : missing ';' before identifier 'gbProcess'
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(23) : error C2144: syntax er
ror : '<Unknown>' should be preceded by '<Unknown>'
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(23) : error C2144: syntax er
ror : '<Unknown>' should be preceded by '<Unknown>'
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(23) : error C2143: syntax er
ror : missing ';' before 'identifier'
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(23) : error C2065: 'gbProces
s' : undeclared identifier
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(23) : error C4013: 'OpenProc
ess' undefined; assuming extern returning int
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(27) : error C2065: 'BYTE' :
undeclared identifier
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(27) : error C2146: syntax er
ror : missing ';' before identifier 'hdata'
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(27) : error C2144: syntax er
ror : '<Unknown>' should be preceded by '<Unknown>'
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(27) : error C2144: syntax er
ror : '<Unknown>' should be preceded by '<Unknown>'
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(27) : error C2143: syntax er
ror : missing ';' before 'identifier'
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(27) : error C2065: 'hdata' :
 undeclared identifier
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(27) : error C2059: syntax er
ror : ']'
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(28) : error C2146: syntax er
ror : missing ';' before identifier 'sizehdata'
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(28) : error C2144: syntax er
ror : '<Unknown>' should be preceded by '<Unknown>'
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(28) : error C2144: syntax er
ror : '<Unknown>' should be preceded by '<Unknown>'
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(28) : error C2143: syntax er
ror : missing ';' before 'identifier'
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(28) : error C2065: 'sizehdat
a' : undeclared identifier
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(30) : error C4013: 'WritePro
cessMemory' undefined; assuming extern returning int
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(30) : error C2065: 'LPVOID'
: undeclared identifier
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(30) : error C2143: syntax er
ror : missing ')' before 'constant'
d:\winddk\3790.1830\src\ddriver\devicedriver\main.c(34) : error C4013: 'CloseHan
dle' undefined; assuming extern returning int
BUILD: Compile errors: not linking d:\winddk\3790~1.183\src\ddriver\devicedriver
 directory
BUILD: Done

    2 files compiled - 34 Errors -    38 LPS