Note the following when writing the first program in Windows:

 

Vs200x Character Problems

Today, I learned to write a C ++ program. I have some problems. The problems and solutions are recorded as follows: # include <windows. h> # Include <stdio. h> lresult callback callwindowproc ( Hwnd, Uint MSG, Wparam, Lparam ); Int winapi winmain ( Hinstance, Hinstance hprevinstance, Lpstr lpcmdline, Int ncmdshow ) { Wndclass wndcls; Wndcls. cbclsextra = 0; Wndcls. cbwndextra = 0; Wndcls. hbrbackground = (hbrush) getstockobject (black_brush ); Wndcls. hcursor = loadcursor (null, idc_arrow ); Wndcls. hicon = loadicon (null, idi_application ); Wndcls. hinstance = hinstance; Wndcls. lpfnwndproc = callwindowproc; Wndcls. lpszclassname = "zhengzhixin1983 "; Wndcls. lpszmenuname = NULL; Wndcls. Style = cs_hredraw | cs_vredraw; Registerclass (& wndcls); hwnd; Hwnd = createwindow ("zhengzhixin1983", "zhengzhixin1983", ws_overlappedwindow, 0, 600,600, null, null, hinstance, null); showwindow (hwnd, sw_shownormal ); Updatewindow (hwnd); MSG; While (getmessage (& MSG, null, 0, 0 )) { Translatemessage (& MSG ); Dispatchmessage (& MSG ); } Return 0; } Lresult callback callwindowproc ( Hwnd, Uint MSG, Wparam, Lparam ) { Switch (MSG) { Case wm_char: Char szchar [20]; Sprintf (szchar, "char is % d", wparam ); MessageBox (hwnd, szchar, "zhengzhixin1983", 0 ); Break; Case wm_lbuttondown: MessageBox (hwnd, "mouse click", "zhengzhixin1983", 0 ); HDC; HDC = getdc (hwnd ); Textout (HDC, 0, 50, "zhengzhixin1983", strlen ("zhengzhixin1983 ")); Releasedc (hwnd, HDC ); Break; Case wm_paint: HDC; Paintstruct pS; HDC = beginpaint (hwnd, & PS ); Textout (HDC, 0, 0, "zhengzhixin1983", strlen ("zhengzhixin1983 ")); Endpaint (hwnd, & PS ); Break; Case wm_close: If (idyes = MessageBox (hwnd, "exit? "," Zhengzhixin1983 ", mb_yesno )) Destroywindow (hwnd ); Break; Case wm_destroy: Postquitmessage (0 ); Break; Default: Return defwindowproc (hwnd, MSG, wparam, lparam );} Return 0; } A problem occurs after compilation: D: \ Vc ++ _ lesson1 \ winmain. CPP (28): Error c2440: '=': cannot convert from 'const char [16] 'to 'lpcwstr' Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast D: \ Vc ++ _ lesson1 \ winmain. CPP (35): Error c2664: 'createjavaswexw': cannot convert parameter 2 from 'const char [16] 'to 'lpcwstr' Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast D: \ Vc ++ _ lesson1 \ winmain. CPP (63): Error c2664: 'messageboxw': cannot convert parameter 2 from 'Char [20] 'to 'lpcwstr' Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast D: \ Vc ++ _ lesson1 \ winmain. CPP (66): Error c2664: 'messageboxw': cannot convert parameter 2 from 'const char [12] 'to 'lpcwstr' Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast D: \ Vc ++ _ lesson1 \ winmain. CPP (69): Error c2664: 'textoutw': cannot convert parameter 4 from 'const char [16] 'to 'lpcwstr' Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast D: \ Vc ++ _ lesson1 \ winmain. CPP (76): Error c2664: 'textoutw': cannot convert parameter 4 from 'const char [16] 'to 'lpcwstr' Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast D: \ Vc ++ _ lesson1 \ winmain. CPP (80): Error c2664: 'messageboxw': cannot convert parameter 2 from 'const char [11] 'to 'lpcwstr' Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast are basically strings that cannot be converted. After forced conversion is added, the program runs garbled characters. Solution: Project> Properties> Configuration Properties> General> Character Set> use multi-byte character sets without enhanced conversion.

Another point is: when creating a project, you should create a Win32 application, instead of a Win32 console program, because the latter's entry function is the main function, and the Win32 application's entry function is the winmain function. This is the difference between the Win32 application and the console program.