|
Drawing in the Client Area
You use the BeginPaint and EndPaint functions to prepare for and complete the drawing in the client area. BeginPaint returns a handle of the display DC used for drawing in the client area; EndPaint ends the paint request and releases the DC.
In the following example, the window procedure writes the message "Hello,
Windows!" in the client area. To make sure the string is visible when the window is
first created, the WinMain function calls UpdateWindow immediately after creating and showing the window. This causes a WM_PAINT message to be sent immediately to the window procedure.
LRESULT APIENTRY WndProc(hwnd, message, wParam, lParam)
HWND hwnd;
UINT message;
WPARAM wParam;
LPARAM lParam;
{
PAINTSTRUCT ps;
HDC hdc;
switch (message) {
case WM_PAINT:
hdc = BeginPaint(hwnd, &ps);
TextOut(hdc, 0, 0, "Hello, Windows!", 15);
EndPaint(hwnd, &ps);
return 0L;
.
.
.
}
}
int APIENTRY WinMain(hInstance, hPrevInstance, lpCmdLine, nCmdShow)
HINSTANCE hInstance; /* handle of current instance */
HINSTANCE hPrevInstance; /* handle of previous instance */
LPSTR lpCmdLine; /* address of command line */
int nCmdShow; /* show-window type (open/icon) */
{
HWND hwnd;
hwnd = CreateWindowEx( /* parameters */ );
ShowWindow(hwnd, SW_SHOW);
UpdateWindow(hwnd);
.
.
.
return msg.wParam;
}
| Last news from Greatis Software |
 |
|
Nostalgia .Net |
|
.Net is powerful, but not all-powerful, so sometimes we need to use Win32 API for our .Net applications. It's simple enough with Platform Invoke if you have Win32 skill, but we do not always have time to dig the ancient documentation, declare the special types that are compatible with Win32, find the values of the Win32's constants and so on. Nostalgia .Net offers several simple-to-use classes, and components that will allow you to forget about the headache of Win32 and just use the power of Win32 in your application the same way as you use the native. Net classes. More » |
| Recommended software for developers |
 |
|
Ultimate Pack |
|
Component pack for Delphi and C++ Builder that contains runtime form designer, runtime object inspector, print suite and much more for the very special price. More » |
 |
|
Form Designer .Net |
|
Unique runtime form design solution that allows to edit any form in .Net WinForms application at runtime with full source codes for only 300 euro! More » |
 |
|
Print Suite .Net |
|
Print Suite .Net is a set of components for easy printing texts, images and grids from your WinForms applications. Full C# source codes are available More » |
 |
|
Gradient Controls .Net |
|
Gradient Controls .Net offers controls with gradient background feature. Labels, panels and so on... Full C# source codes are available More » |
 |
|
Greatis iGrid |
|
iGrid plots drawing grid right over your desktop, so you can use it everywhere, with any drawing application without any special plugins for different graphic editors. More » |
All the contacts and projectsDmitry Vasiliev (just.dmitry)
Related LinksSoftware for Visual Studio .NET developers
Software for Delphi and C++ Builder developers
Software for Visual Basic 6 developers
Delphi Tips&Tricks
MegaDetailed.NET More Online Helps Win32 Programmer's Reference
Win32 Multimedia Programmer's Reference
OLE Programmer's Reference
Microsoft Windows Pen API Programmer's Reference
Microsoft Windows Sockets 2 Reference
Microsoft Windows Telephony API (TAPI) Programmer's Reference
Unix Manual Pages
|
