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• 通过theApp获得主窗口句柄

在任何文件中如何通过theApp获得主窗口的控件，并响应其消息函数

例：

extern CxxxApp theApp

theApp.m_pMainWnd

-

>SendDlgItemMessage(IDC_INPUT_OK,WM_LBUTTONDOWN,NULL,NULL);

theApp.m_pMainWnd

-

>SendDlgItemMessage(IDC_INPUT_OK,WM_LBUTTONUP,NULL,NULL);

以上是对主窗口的IDC_INPUT_OK控件发送单击命令。

• MFC中RadioButton组回调函数使用

在面板中Ctrl+D设置RadioButton分组，将每组第一个Group属性设为True，设置一个变量关联每个组(控件变量选变量值)，对变量赋值UpData(TRUE)传输到面板...

Group Radio Button 响应函数：给第一个添加响应后，将ON_BN_CLICKED(IDC_RADIO1,OnRadio)改为ON_CONTROL_RANGE(BN_CLICKED,IDC_RADIO1,IDC_RADIO10,OnRadio) 此处有10个Radio为一组

• CComBSTR和char*相互转换

char

*IP;

CComBSTR IoResource

=

"L102";

IP

=_com_util

:

:ConvertBSTRToString(IoResource);

IoResource=_com_util::ConvertStringToBSTR(IP);

• MessageBox使用

try{

    ...

}

catch (_com_error

& e)

 {

        

:

:MessageBox(NULL, e.Description(), e.ErrorMessage(), MB_ICONERROR);

}

MessageBox(L

"生成会话工厂实例发生错误！",L

"错误",MB_ICONERROR);

 

• 创建线程

HANDLE pt

=CreateThread(NULL,

0,Thread_Proc,(LPVOID)

&Lxi102channel[n],

0,NULL);

CloseHandle(pt);

 

• 自定义延时函数

void MyDelay(

int n)

{

    

int dwStart

=

0;

    

int dwEnd

=

0;

    

do 

    {

        MSG msg;

        GetMessage(

&msg,NULL,

0,

0);

        TranslateMessage(

&msg);

        DispatchMessage(

&msg);

        dwEnd

=GetTickCount()

-dwStart;

    }

while(dwEnd

<n);

}

 

• 常用字符串操作函数

strcpy(

char

*_Dest,

const

char

* _Source);

strcpy_s(

char

*_Dest,size_t _SizeInBytes,

const

char

* _Source);

wcscpy_s(WCHAR

*_Dest,size_t _SizeInWords,

const WCHAR

*_Source);

swscanf_s(inputDate,L

"%d:%d:%d",

&hh,

&mm,

&ss);

sscanf_s(rawDate,

"%d/%d/%d %d:%d:%d",

&year,

&month,

&day,

&hour,

&minute,

&second);

wsprintf(wstr1,L

"正在进行通道%d等待源设置...",number);

swprintf_s(inputDate,L

"%d:%d:%d",hh,mm,ss);

sprintf_s(scpi_send,SCPI_SEND_LENGTH,

"MEASure:%s(@%d,@%d)\n",measureSwitchStr[measureSwitch],channel1,channel2);

 

• CDC画图

int m_left;

int m_top ;

int m_right; 

int m_bottom;

CDC

*pDC;

CPen pPenRed;

CPen pPenWhite;

CRect drawrect;

CWnd

* pWnd;

pWnd

= GetDlgItem(IDC_DRAW);

//IDC_DRAW为图形控件(也可以是STATIC控件?)

pWnd

-

>GetClientRect(

&drawrect);

//获得画图矩形区

pDC

= pWnd

-

>GetDC();    

pWnd

-

>Invalidate();

pWnd

-

>UpdateWindow();

pDC

-

>Rectangle(

&drawrect);

m_left

= drawrect.left

+

25;

m_top

= drawrect.top

+

5;

m_right

= drawrect.right

-

10;

m_bottom

= drawrect.bottom

-

25;

// 红色画笔

pPenRed.CreatePen(PS_DASHDOTDOT,

1,RGB(

255,

0,

0));

//白色画笔

pPenWhite.CreatePen(PS_SOLID,

1,RGB(

255,

255,

255));

//画一条对角线

pDC

-

>FillSolidRect(

&drawrect, RGB(

0,

0,

0));

//背景黑色

pDC

-

>SelectObject(

&pPenRed);

//使用红笔

pDC

-

>SetTextColor(RGB(

0,

255,

0));

//绿色字体

pDC

-

>MoveTo(m_left,m_bottom);

//线条起点

pDC

-

>LineTo(m_right,m_top);

//线条终点

pDC

-

>TextOut(m_left

+

15,m_bottom

+

3,L

"Hello");

//指定坐标写字

 

• CDC画图移动窗口图形消失解决办法

重载窗口OnPaint()函数

如：

void TSER

:

:OnPaint()

{

    CPaintDC dc(

this);

// device context for painting

    

// TODO: Add your message handler code here

    

// Do not call CDialog::OnPaint() for painting messages

    DrawBackGround();

    DrawWave();

}

• VARIANT数据存储与读取

void getValue(VARIANT

*getVal)

{

    

//返回数组格式为//时间 通道1至16数据

    

/[t0, y1_0 ~ y16_0,

    

//t1, y1_1 ~ y16_1,

    

//t2, y1_2 ~ y16_2，

    

//t3, y1_3 ~ y16_3，

    

//................]

    

/ 返回数据初始化，如果读取数据正常，则返回读取数据，否则返回下列数据

    SAFEARRAY FAR

* psa;

    SAFEARRAYBOUND rgsabound[

1];

    rgsabound[

0].lLbound

=

0;

    rgsabound[

0].cElements

=

20

*

17;

    

long idx

=

0;

    psa

=SafeArrayCreate(VT_I4,

1,rgsabound);

    

for (

unsigned

int n

=rgsabound[

0].lLbound;n

<rgsabound[

0].cElements;n

++)

    {

        readData

=((n

%

17)

==

0)

?(n

*

10)

:(

0);

        idx

=(

long)n;

        SafeArrayPutElement(psa,

&idx,

&readData);

    }

    V_VT(getVal)

= VT_ARRAY

| VT_I4;

    V_ARRAY(getVal)

=psa;

    

/

}

void FormateVariantToDatas()

{

    

unsigned

int xdata[

1024];

    

unsigned

int ydata[

16][

1024];

    VARIANT V_getValue;

    getValue(

&V_getValue);

    

long dim

=SafeArrayGetDim(V_getValue.parray);

    

long ubound;

    

long lbound;

    SafeArrayGetUBound(V_getValue.parray,dim,

&ubound);

    SafeArrayGetLBound(V_getValue.parray,dim,

&lbound);

    

long index

=

0;

    

unsigned

int tempn

=

0;

    

unsigned

int tempnmode

=

0;

    

long    readData;

    

for (

long index

=

0;index

<

=ubound;index

++)

    {

        tempn

=(

unsigned

int)index

/

17;

        tempnmode

=(

unsigned

int)(index

%

17);

        SafeArrayGetElement(V_getValue.parray,

&index,

&readData);

        

if (tempnmode

==

0)

        {

            xdata[tempn]

=readData;

        }

        

else

        {

            ydata[tempnmode

-

1][tempn]

=readData;

        }

    }

}

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