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VC++

Splitter Windows & DLL

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Splitter Window

A frame window splitted into several view panes

Class: CSplitterWnd

Types:

1. Static splitter window(it can split the window atthe time of window is created, after splitting we

cannot change the size of the window)2. Dynamic splitter window(split the window atany time ,after splitting we can change the sizeof the window also)

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CsplitterWnd Methods..

Bool CreateStatic (

Cwnd *parentwnd,// parent frame window

Int rows,//number of rows

Int cols, //no of cols

);

This method is used to create static splitterwindow

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CSplitterWnd methods

Bool create(

Cwnd* parentwnd,//parent frame window

Int rows, //no of rows

Int cols,//no of cols

Size s, //size of the paneCcreatecontext * p

//str variable it hold cruntime class member

Which is responsible for dynamic splitting

);

This method used to create dynamic splitter window

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Steps: Dynamic splitter window

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Select advanced button

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Enable use split window option in window style tab

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View menu split option added use it.

Drag the adjust the size of the window

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MainFrm.cpp -

BOOL CMainFrame::OnCreateClient(LPCREATESTRUCT /*lpcs*/,

CCreateContext* pContext)

{

return m_wndSplitter.Create(this,//main window

2, //adjust row2, //adjust col

CSize(10, 10), //adjust size of the pane

pContext //ccreatecontext str var

);

}

If we want to add any text to the window add text to theondrawmethod present in the view.cpp class file

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Dynamic linked library

Library

1.Static library

In the linking file linked with all associated

library file and create a executable file withlinked libraries (before loading into thememory all libraries are linked)

2.Dynamic libraryAt the time loading into the memory the library

will be linked

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Dynamic Linked Libraries

DLL program(MFC app wizard dll)

create dll file

Another program (MFC app wizard exe)

- use that dll file in the dialog or other appln

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DLL

Dll program..

A MFC dll program can export a methods ,variables class methods, class variables into dll file

Mark the function prototype ( if it is class function constructor and destructor also marked)usingdll export directive

__declspec(dllexport) export directive marked as a function that are exported into dll file

Ex:

__declspec(dllexport)intadd(int a,int b);

The directive should be added before the function prototype..

Execute dll program.. It will produce dll file and lib file in debug folder.

Copied into folder in which program we can use the dll file

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Dll

Program1:

Dll program generate Dll file & lib fileProgram2:

copied dll file into that debug folder and

use it

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Program1: create dll

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Select regular dll using shared mfc dll

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Insert->new class->Create generic class

In this program we export class method and variables..so add our user defined class

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Add method and member variable

Add dll di i h f i

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Add dll export directive to the function

prototype

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Implement the function

E t f ti ill b t d

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Execute program function will be exported

in the dll file(debug folder)

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Program2:

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Add components to that form

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Cont..

1.place the dll and library file to that diloag programdebug folder

2. place class header file area.h(copied from dllprogram) place it to dialog program folder(avoidcompilation error)

3.Add header file info dlg.h

#include area.h

4 P j t > tti >li k t b > t t/lib

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4.Project ->settings->link tab->output/lib

modules(add lib file path)

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Call the dll function use it

void CTestclientDlg::OnButton1()

{

// TODO: Add your control notification handler code here

UpdateData(true);

Carea obj; // we invoke class method so we need to create object

//rad and result are dialog variables

result=obj.circle_area(rad);

UpdateData(false);

}

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Database access through odbc

MFC Class used :

CrecordSet Cdatabase

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Crecordset methods

Add new()

Edit()

Update()

Delete()

Moveprev()

Movenext()

Movelast()

Movefirst()

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Cdatabase

Crecordset(

Cdatabase *pdatabase=NULL;

)

BeginTrans();

Executesql(string sql query);

Committrans()

Rollback()

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Cont..

Create msaccess database file

Use obcdad32 assign dsn name for that

Two columns

Table name book

Bname,cost

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Use app wizard

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Select sdi and doc view architecture

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Select database view with file support

Selet datasource button add table using

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Selet datasource button add table using

odbc dsn name

Following table member will be added

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Following table member will be added

automatically we can use it(..set.h)

Cdbaseset object also created inView h

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Cdbaseset object also created inView.h

we use it..

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Add

Add(){

Updatedata(true);

M_pset->addnew();

M_pset->m_bname=val1

M_pset->cost=val2;

M_pset->update();

}

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edit

edit(){

Updatedata(true);

M_pset->edit();

M_pset->m_bname=val1

M_pset->cost=val2;

M_pset->update();

}

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delete

delete(){

Updatedata(true);

M_pset->delete(); M_pset->m_bname=val1

M_pset->cost=val2;

}

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movefirst

movefirst(){

M_pset->movefirst();

Val1=M_pset->m_bname;

Val2=M_pset->cost;

UpdateData(false);

}

Similar way prev,next,last

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Execute sql

Sql(){

M_pset->m_pdatabase->begintrans();

M_pset->m_pdatabase->executesql(insert

into book values(java,100));

M_pset->m_pdatabase->committrans();

M_pset->m_pdatabase->rollback();//catchblock use it for undo

}

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