GetSystemInfo
GetSystemInfo，Win32 API 函数。
函数说明：
GetSystemInfo返回关于当前系统的信息。
函数原型：
void GetSystemInfo(
LPSYSTEM_INFO lpSystemInfo
);
参数表：
lpSystemInfo
[out] 指向一个供函数返回信息的SYSTEM_INFO结构体。
返回值：
这个函数不返回任何值。
必备条件：
| Client |
Requires Windows XP, Windows 2000 Professional, Windows NT Workstation, Windows Me, Windows 98, or Windows 95. |
| Server |
Requires Windows Server 2003, Windows 2000 Server, or Windows NT Server. |
| Header |
Declared in Winbase.h; include Windows.h.
|
| Library |
Link to Kernel32.lib.
|
| DLL |
Requires Kernel32.dll. |
其他：
SYSTEM_INFO 结构体介绍
示例代码：
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>
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>
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>
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
}
}
参考MSDN.