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