Example script - Using native windows dialogues with alpha4 and above

This code will open the Resize dialogue in an mspaint window and change and save the values there. It uses virtual mouse and keyboard.

SetWindow("- Paint");
global ancestor_hwnd = GetAncestorWindowHWND();
ShowGameWindow(true);
Sleep(1000);

def ClickInnerWindow(window, x,y,button) {
    var original = GetWindowHWND();
    SelectInnerWindowByHWND(window);
    ClickMouse(x,y,button);
    Sleep(100);
    UnselectInnerWindow();
    SelectInnerWindowByHWND(original);
}


SetVirtualInputsOn();
SetVirtualMouseWFPModeOn();

global resizebutton = LoadBitmapFromString(
        "0001>01W^PLRx4sF+o`-Q(5a185jTn&S4Y4000mG5C8}O0a~>8|F8hK3IGOx015yGfB*zZ5{#N" +
        "{4<t`W^*979AlyO5mxCkDBlF6SI#CHEI(_TgO?0mQ3<gKC>^@MfR>z`Uu-JE`qs4}YCtc8ww9#" +
        "|yj>&tFb^{n7{<mBX*_RLE$!tu7xc6(0bxjphls8a`77&~QAL8yvrwS4sVq+r!00000", 0xff00ff, false);


def ResizePaintBMP(newwidth, newheight) {
    var x = 0; var y = 0;
    Scrape();
    if (FindBitmap(x,y, resizebutton, 0, 0)) {
        ClickMouse(x,y,1);
        Sleep(500);
        if (SetWindow("Resize and Skew") == "") {
            Die("Can't find the resize and skew window");
        }
        ResetInnerWindowsIterator();
        for(var w = NextInnerWindowsIterator(); w != 0; w = NextInnerWindowsIterator()) {
            if (GetInnerWindowTextByHWND(w) == "Pixels") {
                ClickInnerWindow(w, 1,1,1);
            }
            if (GetInnerWindowTextByHWND(w) == "&Maintain aspect ratio") {
                ClickInnerWindow(w, 1,1,1);
            }
        }

        var current_window = GetWindowHWND();
        ResetInnerWindowsIterator();
        for(var w = NextInnerWindowsIterator(); w != 0; w = NextInnerWindowsIterator()) {
            if (GetInnerWindowTextByHWND(w) == "&Horizontal:") {
                w = NextInnerWindowsIterator();
                var x = 0; var y = 0; var wi = 0; var he = 0;
                if (GetInnerWindowDims(w, x, y, wi, he)) {
                    SelectInnerWindowByHWND(w);
                    ClickMouse(wi-2,1,1);
                    Sleep(100);
                    for (var i = 0; i < 4; ++i) {
                        KeyDown(0x08);
                        Sleep(100);   
                        KeyUp(0x08);
                    }
                    SendKeys("" + newwidth);
                    UnselectInnerWindow();
                    SelectInnerWindowByHWND(current_window);
                }
            }

            if (GetInnerWindowTextByHWND(w) == "&Vertical:") {
                w = NextInnerWindowsIterator();
                var x = 0; var y = 0; var wi = 0; var he = 0;
                if (GetInnerWindowDims(w, x, y, wi, he)) {
                    SelectInnerWindowByHWND(w);
                    ClickMouse(wi-2,1,1);
                    Sleep(100);
                    for (var i = 0; i < 4; ++i) {
                        KeyDown(0x08);
                        Sleep(100);   
                        KeyUp(0x08);
                    }
                    SendKeys("" + newheight);
                    UnselectInnerWindow();
                    SelectInnerWindowByHWND(current_window);
                }
            }
        }

        ResetInnerWindowsIterator();
        for(var w = NextInnerWindowsIterator(); w != 0; w = NextInnerWindowsIterator()) {
            if (GetInnerWindowTextByHWND(w) == "OK") {
                print(GetInnerWindowTextByHWND(w) + ", " + GetInnerWindowClassNameByHWND(w));
                SelectInnerWindowByHWND(w);
                ClickMouse(1,1,1);
            }       
        }

        SetWindowByHWND(ancestor_hwnd);
        Sleep(100);

    }
}

ResizePaintBMP(900, 600);