Getting Hardware Information (Windows)

Getting Hardware Information

Getting Hardware Information

The following examples get or set hardware information.

Example 1

The following example uses the GetSystemInfo function to obtain hardware information such as the OEM identifier, processor type, page size, and so on. The example displays the information in the console.

#include <windows.h>
#include <stdio.h>
#pragma comment(lib, "user32.lib")

void main()
{
   SYSTEM_INFO siSysInfo;
 
   // Copy the hardware information to the SYSTEM_INFO structure. 
 
   GetSystemInfo(&siSysInfo); 
 
   // Display the contents of the SYSTEM_INFO structure. 

   printf("Hardware information: \n");  
   printf("  OEM ID: %u\n", siSysInfo.dwOemId);
   printf("  Number of processors: %u\n", 
      siSysInfo.dwNumberOfProcessors); 
   printf("  Page size: %u\n", siSysInfo.dwPageSize); 
   printf("  Processor type: %u\n", siSysInfo.dwProcessorType); 
   printf("  Minimum application address: %lx\n", 
      siSysInfo.lpMinimumApplicationAddress); 
   printf("  Maximum application address: %lx\n", 
      siSysInfo.lpMaximumApplicationAddress); 
   printf("  Active processor mask: %u\n", 
      siSysInfo.dwActiveProcessorMask); 
}

Example 2

The following example uses the GetSystemMetrics function to determine whether a mouse is installed and whether the mouse buttons are swapped. The example also uses the SystemParametersInfo function to retrieve the mouse threshold and speed. It displays the information in the console.

#include <windows.h>
#include <stdio.h>
#pragma comment(lib, "user32.lib")

void main()
{
   BOOL fResult;
   int aMouseInfo[3];
 
   fResult = GetSystemMetrics(SM_MOUSEPRESENT); 
 
   if (fResult == 0) 
      printf("No mouse installed.\n"); 
   else 
   { 
      printf("Mouse installed.\n");

      // Determine whether the buttons are swapped. 

      fResult = GetSystemMetrics(SM_SWAPBUTTON); 
 
      if (fResult == 0) 
         printf("Buttons not swapped.\n"); 
      else printf("Buttons swapped.\n");
 
      // Get the mouse speed and the threshold values. 
 
      fResult = SystemParametersInfo(
         SPI_GETMOUSE,  // get mouse information 
         0,             // not used 
         &aMouseInfo,   // holds mouse information 
         0);            // not used 

      if( fResult )
      { 
         printf("Speed: %d\n", aMouseInfo[2]); 
         printf("Threshold (x,y): %d,%d\n", 
            aMouseInfo[0], aMouseInfo[1]); 
      }
   } 
}

Example 3

The following example uses SystemParametersInfo to double the mouse speed.

#include <windows.h>
#include <stdio.h>
#pragma comment(lib, "user32.lib")

void main()
{
   BOOL fResult;
   int aMouseInfo[3];       // array for mouse information
 
   // Get the current mouse speed. 
 
   fResult = SystemParametersInfo(
      SPI_GETMOUSE,   // get mouse information 
      0,              // not used 
      &aMouseInfo,    // holds mouse information
      0);             // not used 
   
   // Double it. 
 
   if( fResult )
   {
      aMouseInfo[2] = 2 * aMouseInfo[2]; 
 
      // Change the mouse speed to the new value. 
 
      SystemParametersInfo(
         SPI_SETMOUSE,      // set mouse information
         0,                 // not used 
         aMouseInfo,        // mouse information 
         SPIF_SENDCHANGE);  // update win.ini 
   }
}

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Build date: 5/14/2009