Opening window: simple program-changing the font color (1)

Simple Program: optimize text color

Let's first look at the program running effect:

After being restored, it becomes the following:

File | new | Win32 application | project "zookeeper color change" | an empty project | complete | confirm,

File | new | C ++ source file | file "Main", and then generate the following code to main. in the CPP file, click optimize again | create "adjust colors to change colors.

The following is the replacement:

//////////////////////////////////////// //////////////////////////////////////// //////////////////////////////////////// ////////////////////

/// // Main. CPP /////////////////////////////////////

//////////////////////////////////////// //////////////////////////////////////// //////////////////////////////////////// ///////////////////

# Include <windows. h>

// Used as the window class name to be deleted
Lpctstr lpszappname = text ("MyApp ");

// Window criteria
Lpctstr lpsztitle = text ("My application ");

// Number of window handling functions

Lresult callback wndproc (hwnd, uint, wparam, lparam );

// Main function, program entry

Int apientry winmain (hinstance, hinstance hprevinstance, lptstr lpcmdline, int ncmdshow)
{

// Message structure description
MSG;

// Window handle
Hwnd;

// Window class fill
Wndclass WC;

WC. Style = cs_hredraw | cs_vredraw;
WC. lpfnwndproc = (wndproc) wndproc;
WC. cbclsextra = 0;
WC. cbwndextra = 0;
WC. hinstance = hinstance;
WC. hicon = loadicon (null, idi_application );
WC. hcursor = loadcursor (null, idc_arrow );
WC. hbrbackground = (hbrush) (color_window + 1 );
WC. lpszmenuname = lpszappname;
WC. lpszclassname = lpszappname;
 

// Window-type Encryption
If (! Registerclass (& WC ))
Return (false );

// Create a window named "my application" based on window WC values

Hwnd = createwindow (lpszappname, lpsztitle, ws_overlappedwindow,
Cw_usedefault, 0, cw_usedefault, 0, null,
Null, hinstance, null );

If (! Hwnd)
Return (false );

// Display this window

Showwindow (hwnd, ncmdshow );

// Update this window
Updatewindow (hwnd );

// Enter message tracking

While (getmessage (& MSG, null, 0, 0 ))
{
Translatemessage (& MSG );
Dispatchmessage (& MSG );
}

Return (msg. wparam );
}

// Number of window handling functions

Lresult callback wndproc (hwnd, uint umsg, wparam, lparam)
{

// Rectangular structure
Rect;

// Display the volume handle
HDC;
Paintstruct pS;

// Three-color variation
Static int ured = 0, ugreen = 0, ublue = 0;

// Message Processing

Switch (umsg)
{
 

// Window deduplication
Case wm_paint:

HDC = beginpaint (hwnd, & PS );
Getclientrect (hwnd, & rect );
Settextcolor (HDC, RGB (ured, ugreen, ublue ));
Drawtext (HDC, text ("Hello! "),-1, & rect,
Dt_singleline | dt_center | dt_vcenter );
Endpaint (hwnd, & PS );

Break;

// If there is a merge Press

Case wm_keydown:

// Colors
Ured = rand () %255;
Ugreen = rand () %255;
Ublue = rand () %255;

// Weight conversion

Invalidaterect (hwnd, null, true );

Break;

// Window renewal history

Case wm_destroy:
Postquitmessage (0 );

Break;

// MMO Message Handling

Default:
Return defwindowproc (hwnd, umsg, wparam, lparam );
}

Return (0 );

}

//////////////////////////////////////// //// // EOF /////////////////////////// ////////////////////////////////////////