intdos

intdos，功能是通用DOS接口 相當於int 21h，用法是nt intdos(union REGS *inregs, union REGS *outregs)。

函式功能

函式名: intdos
功 能: 通用DOS接口
用 法: int intdos(union REGS *inregs, union REGS *outregs);

程式示例

#include
#include
/* deletesfilename; returns 0 on success, nonzero on failure */
int delete_file(char near *filename)
{
union REGS regs;
int ret;
regs.h.ah = 0x41; /* delete file */
regs.x.dx = (unsigned) filename;
ret = intdos(®s, ®s);
/* if carry flag is set, there was an error */
return(regs.x.cflag ? ret : 0);
}
int main(void)
{
int err;
err = delete_file("NOTEXIST.$$$");
if (!err)
printf("Able to delete NOTEXIST.$$$\n");
else
printf("Not Able to delete NOTEXIST.$$$\n");
return 0;
}