Button showing
Author
hwndbutton=CreateWindowEx(NULL,"button","asdas",WS_CHILD|WS_VISIBLE|BS_RADIOBUTTON,100,100,200,24,hwnd,(HMENU)(1112),hInstance,NULL);
I am using this code but it isn´t chowing my button until i "guess" the local of it and click in it ...
I can´t figure out what is wrong...
Thanx in advance
Author
Oh i ''ve fixed the problem i have to use the parent hwnd instead of hwndbutton
Author
When resize the wondow it happens the samething as the first post what is the problem???????
Author
I´ve fixed it again puttin a UpdateWindow in the messageloop is that correct:???
You definately shouldn''t be putting UpdateWindow in the message loop as that is sending loads of WM_PAINT messages and possible WM_NCPAINT messages too. It seems that something is drawing over the button. Make sure that in your code there is nothing that would draw a rectangle over the area that the button is contained in. Check the WM_PAINT message if you have one, or WM_SIZE message to see if something is drawing where it shouldn''t be.
When you first create the button, make sure you call ShowWindow on the parent. Then, when you update the button (move/press/whatever), call InvalidateRect on it.
well i am using ShowWindow for parent hwnd, and the button uses the parent hwnd, and in my WM_PAINT i have InvalidateRect
here is the whole code:
#include<windows.h>#include<windowsx.h>#include"resource.h"#include<stdlib.h>#include<stdio.h>#define WN32_LEAN_AND_MEANconst char sz_classewin[7]="classe";HINSTANCE hInstance_app;LRESULT CALLBACK WndProc(HWND hwnd,UINT msg,WPARAM wParam,LPARAM lParam){ RECT rect; switch(msg) { case WM_COMMAND: if(wParam==1112) { InvalidateRect(hwnd,&rect,0); } case WM_CREATE: { return(0); }break; case WM_DESTROY: { PostQuitMessage(0); }break; case WM_PAINT: { GetWindowRect(hwnd,&rect); ValidateRect(hwnd,&rect); }break; default: break; } return(DefWindowProc(hwnd,msg,wParam,lParam));}int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,int nCmdShow){WNDCLASSEX janela;HWND hwnd;MSG msg;HDC hdc;HPEN blue_pen= CreatePen(PS_SOLID,1,RGB(0,0,255));HBRUSH red_brush= CreateSolidBrush(RGB(255,0,0));RECT rect= {100,10,200,20};POINT poly[5]={100,70,100,400};janela.cbSize=sizeof(WNDCLASSEX);janela.style=CS_DBLCLKS|CS_HREDRAW|CS_VREDRAW|CS_OWNDC;janela.lpfnWndProc=WndProc;janela.cbClsExtra=0;janela.cbWndExtra=0;janela.hInstance=hInstance;janela.hIcon=LoadIcon(hInstance,MAKEINTRESOURCE(IDI_ICON1));janela.hCursor=LoadCursor(NULL,IDC_ARROW);janela.hbrBackground=(HBRUSH)GetStockObject(BLACK_BRUSH);janela.lpszMenuName="MENU1";janela.lpszClassName=sz_classewin;janela.hIconSm=LoadIcon(hInstance,MAKEINTRESOURCE(IDI_ICON1));hInstance_app=hInstance;RegisterClassEx(&janela);hwnd=CreateWindowEx(NULL,sz_classewin,"Janela",WS_OVERLAPPEDWINDOW|WS_VISIBLE,0,0,400,400,NULL, NULL,hInstance,NULL);HMENU hmenuname=LoadMenu(hInstance,MAKEINTRESOURCE(MENU1));SetMenu(hwnd,hmenuname);hdc=GetDC(hwnd); hwnd=CreateWindowEx(NULL,"button","asdas",WS_CHILD|WS_VISIBLE|BS_RADIOBUTTON,100,100,200,24,hwnd,(HMENU)(1112),hInstance,NULL);ShowWindow(hwnd,nCmdShow); UpdateWindow(hwnd);while(TRUE){ if(PeekMessage(&msg,NULL,0,0,PM_REMOVE)) { if(msg.message==WM_QUIT){ break;}TranslateMessage(&msg); DispatchMessage(&msg); } SelectObject(hdc,red_brush); FillRect(hdc,&rect,red_brush); Ellipse(hdc,10,10,30,30); }DeleteObject(red_brush);ReleaseDC(hwnd,hdc); return(0);} This topic is closed to new replies.
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