Published by
Jan 21, 2012 (last update: Jan 28, 2012)

WinAPI source codes

Score: 4.0/5 (30 votes)
*****
I present you a small collection of miscellaneous WinAPI source codes . Feel free to PM me If you have any suggestions or spotted a bug in the code.

Contents

  • Dll injection
  • Get disk size
  • Drive letter changer
  • Associate file extension with a program
  • NtQuerySystemInformation

DLL injection example

Shows how to inject a DLL into process. Project includes a simple DLL and a HelloWorld application for testing.

Download (CodeBlocks project)

Get disk size

This simple application shows how to use DeviceIOControl() and IOCTL_DISK_GET_LENGTH_INFO to get disk or partition size.
If you don't need a fully working app, you can use this function:
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//
// GetDisk or or partition size
// dsk can be \\\\.\\PhysicalDrive0 or \\\\.\\C:
//
uint64_t GetDiskLengthIoctl(const char *dsk)
{
  HANDLE hDisk=CreateFile(dsk,GENERIC_READ,FILE_SHARE_VALID_FLAGS,0,OPEN_EXISTING,0,0);
  if(hDisk==INVALID_HANDLE_VALUE)
    {
      cerr<<"Could not open the disk. GetLastError() returned "<<GetLastError()<<endl;
      return 0;
    }
  GET_LENGTH_INFORMATION gli;
  DWORD ret;

  DeviceIoControl(hDisk,IOCTL_DISK_GET_LENGTH_INFO,0,0,&gli,sizeof(gli),&ret,0);

  CloseHandle(hDisk);
  return gli.Length.QuadPart;
}


Download (CodeBlocks project)

Drive letter changer

A simple program that shows how to use SetVolumeMountPoint to change drive letters

Download (CodeBlocks project)

Associate file extension with a program

Download (CodeBlocks project)

NtQuerySystemInformation examples

.zip file includes three separate projects that show how to use NtQuerySystemInformation() function to..
  • get list of all running processes
  • display some information about physical memory (page size, number of physical pages) and number of processors
  • display number of disks, serial ports, CdRoms

Download (CodeBlocks projects)

Attachments: [CodeInject.zip] [drive_letter_changer.zip] [ext_assoc.zip] [get_disk_size.zip] [nt_query_system_information.zip]