Windows环境下，C++获取打印机名称全步骤

0.官方文档

EnumPrinters 函数 (Winspool.h) - Win32 apps | Microsoft Learn

1.导入需要的头文件

#include <windows.h>
#include <winspool.h>

        请注意，winspool需要依赖windows中的一些内容进行初始化，所以windows.h务必定义在前面，否则会报错。

2.在项目中引入winspool.lib依赖

WinSpool.Lib

3.完整代码

#include <windows.h>
#include <winspool.h>

#include <iostream>
#include <string>
#include <vector>


using namespace std;

vector<string> EnumeratePrinters() {
	vector<string> strResult;
	DWORD needed = 0, returned = 0;
	EnumPrinters(PRINTER_ENUM_LOCAL | PRINTER_ENUM_CONNECTIONS, NULL, 4, NULL, 0, &needed, &returned);
	BYTE* buffer = new BYTE[needed];
	if (EnumPrinters(PRINTER_ENUM_LOCAL | PRINTER_ENUM_CONNECTIONS, NULL, 4, buffer, needed, &needed, &returned)) {
		PRINTER_INFO_4* printerInfo = (PRINTER_INFO_4*)buffer;
		for (DWORD i = 0; i < returned; i++) {
			strResult.push_back(printerInfo[i].pPrinterName);
		}
	}
	delete[] buffer;
	return strResult;
}
int main()
{
	auto values = EnumeratePrinters();
	for (size_t i = 0; i < values.size(); i++)
	{
		printf("%s\n" ,values[i].c_str());
	}
}

4.项目字节问题

        在多字节编码环境下EnumPrinters会被拓展为EnumPrintersA，在Unicode环境下，EnumPrinters会被拓展为EnumPrintersW，在编写项目时请根据自己项目编码而定。