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As there was no feedback from Imen the question perhaps should be deleted. I decided against this because my answer gives some valuable hints for to solve the original requirement which might be valuable for Imen or for others working with MFC.<br />
<br />
Sara
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As there was no feedback from Imen the question perhaps should be deleted. I decided against this because my answer gives some valuable hints for to solve the original requirement which might be valuable for Imen or for others working with MFC.

Sara

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<div class="content wysiwyg-content">
Hello ;<br />
I want to design a GUI.my application is as bellow :<br />
while compiling my program , a first interface is displayed : it is for user authentication, by validating this step ,another interface is displayed :this interface is devided into two screen &nbsp;show(Splitter with two column) the second interface is combined : a menu , and a tree view .by clicking in one item , a data and controls are shown in the right of interface.<br />
To do this application , did I need for SDI or MDI <br />
Also how to navigate between the two interfaces (the authentication interface and the second interface), should I use two Documents ? <br />
For the first interface , I just want a simple area which display the logo of company and an edit control for tapping the Password. but since compiling the project ,always a classic dialog box is shown (made by Microsoft ).<br />
Is there any idea which clarify my needs.<br />
Kindly.
</div>
</div>


Hello ;
I want to design a GUI.my application is as bellow :
while compiling my program , a first interface is displayed : it is for user authentication, by validating this step ,another interface is displayed :this interface is devided into two screen  show(Splitter with two column) the second interface is combined : a menu , and a tree view .by clicking in one item , a data and controls are shown in the right of interface.
To do this application , did I need for SDI or MDI 
Also how to navigate between the two interfaces (the authentication interface and the second interface), should I use two Documents ? 
For the first interface , I just want a simple area which display the logo of company and an edit control for tapping the Password. but since compiling the project ,always a classic dialog box is shown (made by Microsoft ).
Is there any idea which clarify my needs.
Kindly.

SDI for authentication UI

C++ is an intermediate-level general-purpose programming language, not to be confused with C or C#. It was developed as a set of extensions to the C programming language to improve type-safety and add support for automatic resource management, object-orientation, generic programming, and exception handling, among other features.

UI stands for User Interface and UX for User Experience. While there are key differences between the two, both concern the design of how humans interact with computer systems and software.