intro to windows programming

Intro to Windows Programming

Basic Ideas

Program Entry Point

Int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow)

Acts as an entry point just as a main function would act in a C program.

Common Header Files

WINDEF.H – Basic type definitions. WINNT.H – Type definitions for Unicode

support WINBASE.H – Kernel functions. WINUSER.H – User interface functions WINGDI.H – Graphics device interface

functions.

Message Box function

int WINAPI messageBox (HWND,LPCSTR,LPCSTR, UINT)

Acts as a way do display a message onto the screen.

Different String Functions

ILength pString IComp They can do a variety of things such as

calculate string lengths, copy strings, concatenate strings, and compare strings.

Handles

HINSTANCE – Handle to an “instance” – the program itself

HWND – Handle to the window HDC – Handle to a device context The type of the object allows your

program to know how to use the handle

Data Structures

MSG – Message structure WNDCLASS – Window class structure PAINTSTRUCTURE – Paint structure RECT – Rectangle structure First two data structures are used in

WinMain and the second two are used in WndProc

Other Messages

wParm – a 32-bit message parameter dependent on the particcular message

lParam – same as above Pt – mouse coordinates at the time the

message was placed in the message queue