GetSystemDirectory获取系统目录

GetSystemDirectory获取系统目录
windows说明

WINBASEAPI
UINT
WINAPI
GetSystemDirectoryA(
    LPSTR lpBuffer,  //缓冲区用于存放取得的系统目录
    UINT uSize        //缓冲区长度
    );
WINBASEAPI
UINT
WINAPI
GetSystemDirectoryW(
    LPWSTR lpBuffer,
    UINT uSize
    );
#ifdef UNICODE
#define GetSystemDirectory  GetSystemDirectoryW
#else
#define GetSystemDirectory  GetSystemDirectoryA
#endif // !UNICODE

GetWindowsDirectory 获取windows安装目录
windows定义

WINBASEAPI
UINT
WINAPI
GetWindowsDirectoryA(
    LPSTR lpBuffer,  //缓冲区
    UINT uSize        //缓冲区长度
    );
WINBASEAPI
UINT
WINAPI
GetWindowsDirectoryW(
    LPWSTR lpBuffer,
    UINT uSize
    );
#ifdef UNICODE
#define GetWindowsDirectory  GetWindowsDirectoryW
#else
#define GetWindowsDirectory  GetWindowsDirectoryA
#endif // !UNICODE

GetUserName 获取用户名
windows定义

WINADVAPI
BOOL
WINAPI
GetUserNameA (
    LPSTR lpBuffer,   //缓冲区
    LPDWORD nSize  //设置缓冲区长度
    );
WINADVAPI
BOOL
WINAPI
GetUserNameW (
    LPWSTR lpBuffer,
    LPDWORD nSize
    );
#ifdef UNICODE
#define GetUserName  GetUserNameW
#else
#define GetUserName  GetUserNameA
#endif // !UNICODE

GetComputerName 获取主机名
系统定义

WINBASEAPI
BOOL
WINAPI
SetComputerNameA (
    LPCSTR lpComputerName
    );
WINBASEAPI
BOOL
WINAPI
SetComputerNameW (
    LPCWSTR lpComputerName
    );
#ifdef UNICODE
#define SetComputerName  SetComputerNameW
#else
#define SetComputerName  SetComputerNameA
#endif // !UNICODE

SystemParametersInfo 获取和设置外设信息
系统定义

WINUSERAPI
BOOL
WINAPI
SystemParametersInfoA(
    UINT uiAction,
    UINT uiParam,
    PVOID pvParam,
    UINT fWinIni);
WINUSERAPI
BOOL
WINAPI
SystemParametersInfoW(
    UINT uiAction,
    UINT uiParam,
    PVOID pvParam,
    UINT fWinIni);
#ifdef UNICODE
#define SystemParametersInfo  SystemParametersInfoW
#else
#define SystemParametersInfo  SystemParametersInfoA
#endif // !UNICODE

设置系统参数函数
BOOL SystemParametersInfo（UINT uiAction，UINT uiParam，PVOID pvParam，UINT fWinlni）；
SystemParametersInfo函数查询或设置系统级参数。函数原型是BOOL SystemParametersInfo。该函数也可以在设置参数中更新用户配置文件，这个函数还有很多其它功能，比如获取桌面工作区的大小。

#include <Windows.h>
#include <stdio.h>
//#include <stdafx.h>

int main()
{
	TCHAR szStr[MAX_PATH];
	TCHAR szWindowspath[MAX_PATH];
	TCHAR szComputerName[20+1];
	DWORD dwComputerNameLength = 20+1;
	TCHAR szUserName[32];
	DWORD nUserNameLength = 32;
	if(GetSystemDirectory(szStr,strlen(szStr)) <= 0)
	{
		printf("Getsystemdirectory error,Error No:%d\n",GetLastError());
		return 1;
	}

	printf("System path:%s\n",szStr);

	GetWindowsDirectory(szWindowspath,MAX_PATH);
	printf("Windows path:%s\n",szWindowspath);
	GetComputerName(szComputerName,&dwComputerNameLength);
	printf("computer name:%s\n",szComputerName);

	GetUserName(szUserName,&nUserNameLength);
	printf("User name:%s\n",szUserName);

	BOOL fResult = false;
	int aMouseInfo[3];
	fResult = SystemParametersInfo(SPI_GETMOUSE,0,&aMouseInfo,0);
	if(fResult)
	{
		aMouseInfo[2] *= 2;
		SystemParametersInfo(SPI_SETMOUSE,0,aMouseInfo,SPIF_SENDCHANGE);
	}

	SERIALKEYS keys;
	SystemParametersInfo(SPI_GETPOWEROFFACTIVE,1,&keys,sizeof(keys));


	printf("mouse chaned ok!\n");
	return 0;
}

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标签：WINAPI,GetSystemDirectory,获取,SystemParametersInfo,UINT,UNICODE,BOOL,系统目录,define
来源： https://blog.csdn.net/weixin_43069562/article/details/104161729