VisualCpp.org Collection of Visual C++ Stuffs

How to dynamically show and hide Title bar?

Window api's is key for every thing , Use ModifyStyle and SetWindowPos api achieve same

This will hide the title:

ModifyStyle(WS_CAPTION,0);
::SetWindowPos(m_hWnd,HWND_TOP,0,0,0,0,SWP_SHOWWINDOW | SWP_NOSIZE | SWP_NOMOVE);

To show it Again

ModifyStyle(0,WS_CAPTION);
::SetWindowPos(m_hWnd,HWND_TOP,0,0,cx,cy,SWP_SHOWWINDOW | SWP_NOSIZE |SWP_NOMOVE);

How to resize the application according to Screen Resolution?

You can resize your window using these two api: GetSystemMetrics and MoveWindow api's.

HWND hWnd= hWnd is Handle to Current/Application Window;
TCHAR szString[100] ={0}; // Get Screen X and Y
int cx=GetSystemMetrics(SM_CXFULLSCREEN);
int cy=GetSystemMetrics(SM_CYFULLSCREEN);
sprintf(szString,"your Current Window Resolution is %d * %d",cx,cy); //now to resize according to screen resolution
MoveWindow(hWnd,0,0,cx,cy,TRUE);

Now you might be thinking, why i don't call directly call ShowWindow(SW_MAXIMIZE)..., because using above method,we can cover the taskbar too.

How to Copy and Paste Data from ClipBoard ?

Use these Api's :-

   1. OpenClipboard : The OpenClipboard function opens the clipboard for examination and prevents other applications from modifying the clipboard content
   2. GetClipboardData: the GetClipboardData function retrieves data from the clipboard in a specified format. The clipboard must have been opened previously
   3. SetClipboardData: The SetClipboardData function places data on the clipboard in a specified clipboard format. The window must be the current clipboard owner, and the application must have called the OpenClipboard function.
   4. CloseClipboard: Closes the clipboard

Copy a bitmap to Memory


HANDLE hDib= any Image Handle
if(OpenClipBoard(NULL)!=NULL)
{
SetClipboardData(CP_DIB,hDib);
}


Copy data from memory


HANDLE hDib;
if(OpenClipBoard(NULL)!=NULL)
{
hDib=GetClipboardData(CP_DIB);
}


How to reterive computer IPAddress and computer name?

1. GetHostName: for reteriving local host name.
 [Code Snippet]

 TCHAR  szHostName[200] ={0};
 GetHostName(HostName,199);


2. GetHostByName: For Resolving IP Address
[Code Snippet]

 hostent *p;
 p=::gethostbyname(HostName);
 TCHAR  *IP=inet_ntoa(*(struct in_addr*)*(p->h_addr_list));
  
   IP contain the ipaddress of computer