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program to zoom a rectangle as you drag1 generate a sdi application2 declare the 2 member variables clicked of boolean type and mptoldpt of cpoint
default values for gdi objectsthe default color for the brush is white pen is black and default bitmap is null and the default font is
illustration of gdi object cpen1 generate a sdi application and name it as gdipen2 press ctrl control key and w altogether to invoke the class
gdi objects the cdc provides 5 versions for the gdi objects they are fonts brushes pens bitmaps and regions the select object function substitutes
use of wmsize messagewhenever the wmsize message is handled and the graphical objects on the output window will also change consequently to the
message handling1 the message is send to the window and it is sent to the window procedure2 the message map holds all the message handlers3 the
deleting handlers with class wizardthe handler can be deleted by using the class wizard the class wizard will delete the prototype and message map
adding handlers with class wizardwhenever a handler is added the class wizard places the prototype for the message handler in the header h file it
appwizard the appwizard is a tool used for creating a project it follows a series of steps to create a projectsteps involved in creating a
the precompiled header fileas soon as you generate a blank project ahead of doing any coding you compile the project to generate pch that is the pre
the mfc classesthe cdocument cwinappcframewnd and cview are derived from the cobject and they give the majority of the structure and
dialog based applicationthe application which app wizard generates is based on the dialog template
files in a sdi and mdi applicationboth the sdi and mdi projects have 4 implementation files cpp extension these are the files equivalent to the
mdi applicationthe mdi application utilizes the main frame window as the work space in which the user can open more document frame
sdi applicationthe sdi application uses the main frame window to exhibit a document only one document can be opened at a particular
introduction to visual c programmingthis section introduces you to develop the applications using vc the single document interface sdi multiple
deleting recordsto remove a record use the delete method to delete the record from the customer table follow the coding as shown
adding records1 as in the earlier case set the databasename property as cexmdb now set the record source for the data control as customer and set the
the refresh methodthe refresh method transfer to the first record in the record set to invoke the refresh method follow the syntax which is as shown
a project to display a database1 suppose that there are 5 fields describing a customer id address name city amp state2 put 5 text boxes on the form
displaying the databasethe text box image box check box labels picture box can be bounded to the data control for exhibiting the data base contents
data controlthe data control is used to connect to the database three properties are very necessary to connect to the database the primary property
control arraythe control array is a group of similar objects with similar name adding controls with control arrays uses less resource than simply
basic microprocessor architecture and interface introductionintel launches its first 4-bit microprocessor 4004 in the year 1971 and 8-bit
steps for creating a mdi form1 build a new form and set ismdicontainer property to true2 build a child form class to add to the form3 now right click