Need help with fixing error within code

[XeLucky]

I have recently started working on an in-game mod menu for Call of Duty Black Ops II on the Xbox 360 for the latest title update 18. This is what I have wrote up so far and when I went to build it, I encountered quite a few errors.

Any help you can give me would be greatly appreciated :)

int G_Entity(int Client)
{
    return(0x833D0640 + (Client * 0x31C));
}

unsigned int GetPlayerState(int Client)
{
    return(0x83551A10 + (Client * 0x57F8));
}

void SwitchToWeap(int Client, const char *Weapon, int WeaponIndex = 0)
{
    if(WeaponIndex == 0)
    {
        char buffer[100];
        sprintf(buffer,"a %i", G_GetWeaponIndexForName(Weapon));
        SV(Client, 1, buffer);
    }
    else
    {
        char buffer[100];
        sprintf(buffer,"a %i", WeaponIndex);
        SV(Client, 1, buffer);
    }
}

bool Key_IsDown(int localClientIndex, int keynum)
{
    if(keynum == -1 || localClientIndex > 3)
        return false;
    else
        return *(int*)(0x82C0CDA8 + (keynum * 0x10) + (localClientIndex * 0x1128) + 0x128);
}

__declspec(naked) bool Key_IsDown(int localClientIndex, int keynum)
{
    if(keynum == -1 || localClientIndex > 3)
    {
        __asm
        {
            li      r3, 0
            blr
        }
    }
    else
    {
        __asm
        {
            mr r4, keynum
            mr r3, localClientIndex
            lis       r9, 0x82AC
            addi      r11, r9, -0xCA40
            mulli     r10, r3, 0x1128
            mulli     r9, r4, 0x10
            addi      r7, r11, 0x128
            add       r6, r10, r9
            lwzx      r3, r6, r7
            blr
        }
    }
}

game_hudelem_s * spawnElem(int ClientNum)
{
	game_hudelem_s * elem = HudElem_Alloc(0,0);
	elem->ClientNum = ClientNum;
	return elem;
}

game_hudelem_s * Shader[18], * Scrollbar[18], * Title[18], * Newsbar[18], * Text[18];

void MoveOverTime(game_hudelem_s *elem, int time, float x, float y)
{
	elem->elem.fromX = elem->elem.x;
	elem->elem.fromY = elem->elem.y;
	elem->elem.fromAlignOrg = elem->elem.alignOrg;
	elem->elem.fromAlignScreen = elem->elem.alignScreen;
	elem->elem.moveStartTime = *(int*)0x8310A12C;
	elem->elem.moveTime = time;
	elem->elem.x = x;
	elem->elem.y = y;
}

void setShader(game_hudelem_s * elem, const char * materialName, float x, float y, int width, int height, int alignOrg, int alignScreen, float sort = 0, byte r = 255, byte g = 255, byte b = 255, byte a = 255)
{
	elem->elem.type = 0x04;
	elem->elem.alignOrg = alignOrg;
	elem->elem.alignScreen = alignScreen;
	elem->elem.x = x;
	elem->elem.y = y;
	elem->elem.color.r = r;
	elem->elem.color.g = g;
	elem->elem.color.b = b;
	elem->elem.color.a = a;
	elem->elem.width = width;
	elem->elem.height = height;
	elem->elem.sort = sort;
	elem->elem.materialIndex = G_MaterialIndex(materialName);
}

void setText(game_hudelem_s * elem, const char * text, int font, float fontScale, float x, float y, int alignOrg, int alignScreen, float sort = 1, byte r = 255, byte g = 255, byte b = 255, byte a = 255)
{
	elem->elem.type = 0x01;
	elem->elem.alignOrg = alignOrg;
	elem->elem.alignScreen = alignScreen;
	elem->elem.font = font;
	elem->elem.fontScale = fontScale;
	elem->elem.x = x;
	elem->elem.y = y;
	elem->elem.color.r = r;
	elem->elem.color.g = g;
	elem->elem.color.b = b;
	elem->elem.color.a = a;
	elem->elem.sort = sort;
	elem->elem.text = G_LocalizedStringIndex(text);
}

float FindY(int client)
{
	return (Menu[client].Scroll * 32) + 230;
}

void SwapMenu(int client,const char* text,int Size,int subNumber)
{
	Menu[client].Size = Size;
	Menu[client].Scroll = 0;
	Menu[client].SubMenu = subNumber;
	Text[client]->elem.text = G_LocalizedStringIndex(text);
	MoveOverTime(Scrollbar[client],230,580,FindY(client));
}

typedef unsigned int		start;

void StartUp()
{
	for(start i = 0;i<18;i++)
	{
		Shader[i] = HudElem_Alloc(i,0);
		Scrollbar[i] = HudElem_Alloc(i,0);
		Newsbar[i] = HudElem_Alloc(i,0);
		Text[i] = HudElem_Alloc(i,0);
		setShader(Shader[i],"",580,360,100,200,0x5,0x5,1,0,0,0,150);
		setShader(Scrollbar[i],"",320,400,100,200,0x5,0x5,1,255,0,0,150);
		setShader(Newsbar[i],"",100,255,80,10,0x5,0x5,1,0,0,0,150);
		setText(Title[i],"Untitled",5,3.5,0,0,0x5,0x5,255,255,255,255);
	}
	loaded = true;
}

void Select(int Client, int Option, int SubMenu)
{
	switch(SubMenu)
	{
	case 1:
		switch(Option)
		{
		case 1:
			{
				setText(Title[Client],"",5,2.5,580,100,0x5,0x5,255,255,255,255,255);
			}
			break;
			{

			}
		}
	}
}

BOOL WINAPI DllMain(HANDLE hInstDLL, DWORD reason, LPVOID IpReserved)
{
	switch(reason)
	{
	case DLL_THREAD_ATTACH:
		printf("");
		Sleep(45);
		break;
	case DLL_THREAD_DETACH:
		printf("");
		Sleep(45);
		break;
	}
}

ERRORS:

error C2084: function 'bool Key_IsDown(int,int)' already has a body
error C2440: '=' : cannoct convert from 'bool (__cdecl*)(int,int)' to 'bool'
error C3861: 'Key_IsDown': identifier not found
error C2440: '=' : cannot convert from 'bool (__cdecl *)(int,int) to 'bool'
error C3861: 'Key_IsDown': identifier not found
error C2371: 'hudelem_s::color' : redefinition; different basic types
error C2371: 'hudelem_s::fromColor' : redefinition; different basic types
error C2228: ;eft of '.r' must have class/struct/union
error C2228: ;eft of '.g' must have class/struct/union
error C2228: ;eft of '.b' must have class/struct/union
error C2228: ;eft of '.a' must have class/struct/union
error C2228: ;eft of '.r' must have class/struct/union
error C2228: ;eft of '.g' must have class/struct/union
error C2228: ;eft of '.b' must have class/struct/union
error C2228: ;eft of '.a' must have class/struct/union

[coder777]

Key_IsDown exists twice (with the same signature). Use a different name for one of them