VC++获取屏幕大小第一篇像素大小GetSystemMetrics

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原创最新推荐文章于 2026-10-20 16:39:57 发布 2.7w 阅读 AI 写同款· GEO 优化 ›

VC++实战：屏幕信息枚举与全局鼠标钩子开发指南在Windows桌面应用开发中，系统信息获取与全局事件监听是两项基础且关键的技术。其核心原理在于通过操作系统提供的原生API，如GetSystemMetrics、EnumDisplayMonitors等，精确枚举多显示器环境下的屏幕尺寸、分辨率及DPI等参数；同时利用SetWindowsHookEx等钩子机制，实现对鼠标移动、点击等全局输入事件的底层捕获。掌握这些技术对于开发需要精准屏幕适配的自动化测试工具、高精度屏幕取色器、以及全局快捷键管理等应用具有重要价值。本文以VC++与原生Win32 API为例，阅读详情

《VC++获取屏幕大小第一篇像素大小 GetSystemMetrics》和《VC++获取屏幕大小第二篇物理大小GetDeviceCaps 上》和《VC++获取屏幕大小第三篇物理大小GetDeviceCaps下》这三篇文章主要讲解在VC++下获取屏幕大小。这个功能非常简单，也比较实用。

要获取屏幕的像素大小要使用GetSystemMetrics函数。下面就来看看这个函数的用法：

函数功能：用于得到被定义的系统数据或者系统配置信息

函数原型：

// By MoreWindows( http://blog.youkuaiyun.com/MoreWindows )

int WINAPIGetSystemMetrics(

int nIndex

);

参数说明：

这个函数只有一个参数，不过这个参数可以取很多值。在WINUSER.H中有：

* GetSystemMetrics() codes

*// MoreWindows( http://blog.youkuaiyun.com/MoreWindows )

#define SM_CXSCREEN 0

#define SM_CYSCREEN 1

#define SM_CXVSCROLL 2

#define SM_CYHSCROLL 3

#define SM_CYCAPTION 4

#define SM_CXBORDER 5

#define SM_CYBORDER 6

#define SM_CXDLGFRAME 7

#define SM_CYDLGFRAME 8

#define SM_CYVTHUMB 9

#define SM_CXHTHUMB 10

#define SM_CXICON 11

#define SM_CYICON 12

#define SM_CXCURSOR 13

#define SM_CYCURSOR 14

#define SM_CYMENU 15

#define SM_CXFULLSCREEN 16

#define SM_CYFULLSCREEN 17

#define SM_CYKANJIWINDOW 18

#define SM_MOUSEPRESENT 19

#define SM_CYVSCROLL 20

#define SM_CXHSCROLL 21

#define SM_DEBUG 22

#define SM_SWAPBUTTON 23

#define SM_RESERVED1 24

#define SM_RESERVED2 25

#define SM_RESERVED3 26

#define SM_RESERVED4 27

#define SM_CXMIN 28

#define SM_CYMIN 29

#define SM_CXSIZE 30

#define SM_CYSIZE 31

#define SM_CXFRAME 32

#define SM_CYFRAME 33

#define SM_CXMINTRACK 34

#define SM_CYMINTRACK 35

#define SM_CXDOUBLECLK 36

#define SM_CYDOUBLECLK 37

#define SM_CXICONSPACING 38

#define SM_CYICONSPACING 39

#define SM_MENUDROPALIGNMENT 40

#define SM_PENWINDOWS 41

#define SM_DBCSENABLED 42

#define SM_CMOUSEBUTTONS 43

#if(WINVER >= 0x0400)

#define SM_CXFIXEDFRAME SM_CXDLGFRAME /* ;win40 name change */

#define SM_CYFIXEDFRAME SM_CYDLGFRAME /* ;win40 name change */

#define SM_CXSIZEFRAME SM_CXFRAME /* ;win40 name change */

#define SM_CYSIZEFRAME SM_CYFRAME /* ;win40 name change */

#define SM_SECURE 44

#define SM_CXEDGE 45

#define SM_CYEDGE 46

#define SM_CXMINSPACING 47

#define SM_CYMINSPACING 48

#define SM_CXSMICON 49

#define SM_CYSMICON 50

#define SM_CYSMCAPTION 51

#define SM_CXSMSIZE 52

#define SM_CYSMSIZE 53

#define SM_CXMENUSIZE 54

#define SM_CYMENUSIZE 55

#define SM_ARRANGE 56

#define SM_CXMINIMIZED 57

#define SM_CYMINIMIZED 58

#define SM_CXMAXTRACK 59

#define SM_CYMAXTRACK 60

#define SM_CXMAXIMIZED 61

#define SM_CYMAXIMIZED 62

#define SM_NETWORK 63

#define SM_CLEANBOOT 67

#define SM_CXDRAG 68

#define SM_CYDRAG 69

#endif /* WINVER >= 0x0400 */

#define SM_SHOWSOUNDS 70

#if(WINVER >= 0x0400)

#define SM_CXMENUCHECK 71 /* Use instead of GetMenuCheckMarkDimensions()! */

#define SM_CYMENUCHECK 72

#define SM_SLOWMACHINE 73

#define SM_MIDEASTENABLED 74

#endif /* WINVER >= 0x0400 */

#if (WINVER >= 0x0500) || (_WIN32_WINNT >= 0x0400)

#define SM_MOUSEWHEELPRESENT 75

#endif

#if(WINVER >= 0x0500)

#define SM_XVIRTUALSCREEN 76

#define SM_YVIRTUALSCREEN 77

#define SM_CXVIRTUALSCREEN 78

#define SM_CYVIRTUALSCREEN 79

#define SM_CMONITORS 80

#define SM_SAMEDISPLAYFORMAT 81

#endif /* WINVER >= 0x0500 */

#if (WINVER < 0x0500) && (!defined(_WIN32_WINNT) || (_WIN32_WINNT < 0x0400))

#define SM_CMETRICS 76

#else

#define SM_CMETRICS 83

#endif

//http://blog.youkuaiyun.com/morewindows/article/details/8502583

呵呵，够多吧，不用记，要用的时候查下MSDN就好了。由MSDN可以知道传入SM_CXSCREEN和SM_CYSCREEN就得到屏幕的宽和高。详见代码：

//   获取屏幕大小 像素大小
// By MoreWindows( http://blog.youkuaiyun.com/MoreWindows )
#include <stdio.h>
#include <windows.h>
int main()
{
	printf("    获取屏幕大小 像素大小\n");        
	printf(" -- By MoreWindows( http://blog.youkuaiyun.com/MoreWindows ) --\n\n");   

	int nScreenWidth, nScreenHeight;
	nScreenWidth = GetSystemMetrics(SM_CXSCREEN);
	nScreenHeight = GetSystemMetrics(SM_CYSCREEN);

	printf("屏幕大小（像素） 宽：%d 高：%d\n", nScreenWidth, nScreenHeight);
	return 0;
}

运行结果如下：