如何编程调整 Windows mobile 的屏幕亮度?

Kevenshao 2008-04-25 10:33:12

有什么API或是发出什么消息来调整windows mobile6 的屏幕亮度?

...全文

1005 17 打赏收藏转发到动态举报

写回复

用AI写文章

17 条回复

切换为时间正序

请发表友善的回复…

发表回复

liangls1982 2009-05-18

打赏
举报

不好意思，re错了帖子，麻烦版主删除上面的帖子

应该是下面这个代码片段

需要
#include <Pm.h>

感谢楼主！可以使用

[Quote=引用 8 楼 biosli 的回复:]
C/C++ code
// 开关灯的代码，来自MSDN
// IN BOOL fBacklightOn - TRUE to keep the backlight on.
void SetBacklightRequirement(BOOL fBacklightOn)
{
// The name of the backlight device.
TCHAR tszBacklightName[] = TEXT("BKL1:");

static HANDLE s_hBacklightReq = NULL;

if (fBacklightOn)
{
if (NULL == s_hBacklightReq)
{
// Turn the b…
[/Quote]

liangls1982 2009-05-18

打赏
举报

还需要
#include <Pm.h>

感谢楼主！可以使用

[Quote=引用 12 楼 fambalaya 的回复:]
Read the following code

1 static bool TestLcdLight()
2 {
3 LED_INTENSITY_DATA LedIntensityData;
4 HANDLE m_hLed = CreateFile(NLED_DEVICE_NAME, 0, 0, NULL, 0, 0, NULL);
5 if (m_hLed == INVALID_HANDLE_VALUE)
6 {
7 return false;
8 }
9 LedIntensityData.LedNumber = 3;
10 Sleep(1000);
11
12 for (int i=10…
[/Quote]

zhaojiangang 2009-01-04

打赏
举报

C# 该如何实现呢？必须依赖厂家提供的SDK么？

baconxd 2008-11-05

打赏
举报

关注一下
刚好我也寻找相关内容。

maomi01 2008-05-18

打赏
举报

fambalaya 2008-05-06

打赏
举报

Read the following code

1 static bool TestLcdLight()
2 {
3 LED_INTENSITY_DATA LedIntensityData;
4 HANDLE m_hLed = CreateFile(NLED_DEVICE_NAME, 0, 0, NULL, 0, 0, NULL);
5 if (m_hLed == INVALID_HANDLE_VALUE)
6 {
7 return false;
8 }
9 LedIntensityData.LedNumber = 3;
10 Sleep(1000);
11
12 for (int i=100;i>0;i-=10)
13 {
14 LedIntensityData.Intensity = i;
15 DeviceIoControl(m_hLed, IOCTL_NLED_SETLEDINTENSITY,
16 &LedIntensityData, sizeof(LedIntensityData ), NULL, 0, NULL, NULL );
17 Sleep(150);
18 }
19
20 for (int i=0;i<100;i+=10)
21 {
22 LedIntensityData.Intensity = i;
23 DeviceIoControl(m_hLed, IOCTL_NLED_SETLEDINTENSITY,
24 &LedIntensityData, sizeof(LedIntensityData ), NULL, 0, NULL, NULL );
25 Sleep(150);
26 }
27 CloseHandle(m_hLed);
28 return true;
29 }
30

biosli 2008-05-06

打赏
举报

lz我试了一下，修改注册表项马上就能生效啊～～



HKEY  hKey;

LPCWSTR lpTimeOutKey = L"\\ControlPanel\\BackLight";



if (RegOpenKeyEx(HKEY_CURRENT_USER, lpTimeOutKey ,0, 0, &hKey)==ERROR_SUCCESS)

{

	DWORD data = 7-lightLv; \\lightLv为亮度级数

	if (RegSetValueEx(hKey,L"Brightness",0,REG_DWORD,(CONST BYTE*)&data,sizeof(DWORD)) != ERROR_SUCCESS)

	{

		MessageBox(NULL,_T("失败"),_T("Faild"),MB_OK);

	}

}

RegCloseKey(hKey);

文斌 2008-04-29

打赏
举报

把D3改成D0就会最亮了,你查查MSDN该函数的描述就知道了.

Kevenshao 2008-04-29

打赏
举报

我修改的是 HKEY_CURRENT_USER\ControlPanel\BackLight\Brightness的值.

zl_inter 2008-04-28

打赏
举报

理论上是修改注册表就ok了！

你没有生效，估计是要postmessage，告诉WM_settingchange

biosli 2008-04-28

打赏
举报

用了一下楼上给的函数，屏幕变成了“关闭”状态……
这个函数太狠了……

文斌 2008-04-28

打赏
举报

SetDevicePower(_T("BKL1:"),POWER_NAME,D3);

biosli 2008-04-28

打赏
举报



//  开关灯的代码，来自MSDN

//  IN BOOL fBacklightOn - TRUE to keep the backlight on.

void SetBacklightRequirement(BOOL fBacklightOn)

{

    // The name of the backlight device.

    TCHAR tszBacklightName[] = TEXT("BKL1:"); 



    static HANDLE s_hBacklightReq = NULL;

    

    if (fBacklightOn) 

    {

        if (NULL == s_hBacklightReq) 

        {

            // Turn the backlight on by setting the requirement that the backlight device 

            // must remain in device state D0 (full power). Replace D0 with D4 (zero power) to 

            // turn the backlight off.

            s_hBacklightReq = SetPowerRequirement(tszBacklightName, D0, POWER_NAME, NULL, 0);



            if (!s_hBacklightReq)

                RETAILMSG(1, (L"SetPowerRequirement failed: %X\n", GetLastError()));

        }

    } 

    else 

    {

        if (s_hBacklightReq) 

        {

            if (ERROR_SUCCESS != ReleasePowerRequirement(s_hBacklightReq))

                RETAILMSG(1, (L"ReleasePowerRequirement failed: %X\n", GetLastError()));



            s_hBacklightReq = NULL;

        }

    }

}

biosli 2008-04-28

打赏
举报

[Quote=引用 2 楼 Kevenshao 的回复:]
我已经试过了,不行,
我通过修改注册表来改变亮度,但是必须重起机子才能生效,有哪个知道一个修改注册表后能立即生效的办法?
[/Quote]

楼主，你改的是注册表哪一项？
是HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Power\State\BacklightOff里面的bkl1:么？